25 results found for "pigment basics" in Class 10.
प्रकाश संश्लेषण की प्रक्रिया में हरा वर्णक केवल रंग देने वाला पदार्थ नहीं है। इसका मुख्य कार्य क्या है?
In photosynthesis the green pigment is not just a colouring substance. What is its main function?
#chlorophyll
#light-energy
#photosynthesis
A जल को पित्त में बदलना / To change water into bile
B प्रकाश ऊर्जा को ग्रहण करना / To absorb light energy
C मूत्र को संग्रह करना / To store urine
D रक्त को छानना / To filter blood
Explanation opens after your attempt
Correct Answer
B. प्रकाश ऊर्जा को ग्रहण करना / To absorb light energy
Step 1
Concept
Sunlight is the source of energy in photosynthesis.
Step 2
Why this answer is correct
The green pigment helps capture this energy.
Step 3
Exam Tip
Without it food formation can become slow. चरण 1: प्रकाश संश्लेषण में सूर्य प्रकाश ऊर्जा का स्रोत है। चरण 2: हरा वर्णक इस ऊर्जा को पकड़ने में सहायता करता है। चरण 3: इसलिए इसके बिना भोजन निर्माण की दर कम हो सकती है।
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यदि किसी पौधे में पर्याप्त प्रकाश और जल हो लेकिन पत्तियों में हरा वर्णक बहुत कम हो तो भोजन निर्माण सबसे अधिक क्यों घटेगा?
If a plant has enough light and water but very little green pigment in leaves why will food formation decrease most?
#photosynthesis
#chlorophyll
#food-making
A कार्बन डाइऑक्साइड का प्रवेश तुरंत बंद हो जाएगा / Entry of carbon dioxide will stop immediately
B प्रकाश ऊर्जा को प्रभावी ढंग से ग्रहण नहीं किया जा सकेगा / Light energy will not be absorbed effectively
C जड़ें मिट्टी से लवण लेना बंद कर देंगी / Roots will stop absorbing salts from soil
D फ्लोएम जल को ऊपर नहीं पहुंचा पाएगा / Phloem will not carry water upward
Explanation opens after your attempt
Correct Answer
B. प्रकाश ऊर्जा को प्रभावी ढंग से ग्रहण नहीं किया जा सकेगा / Light energy will not be absorbed effectively
Step 1
Concept
Photosynthesis needs light energy.
Step 2
Why this answer is correct
The green pigment helps absorb light energy.
Step 3
Exam Tip
Therefore low green pigment can reduce the rate of food formation. चरण 1: प्रकाश संश्लेषण में प्रकाश ऊर्जा की जरूरत होती है। चरण 2: हरा वर्णक प्रकाश ऊर्जा ग्रहण करने में मदद करता है। चरण 3: इसलिए उसके कम होने पर भोजन निर्माण की दर घट सकती है।
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कला के तत्वों का सही उपयोग किसे बेहतर बनाता है?
Correct use of elements of art improves what?
#art elements
#visual composition
#basics
A दृश्य रचना / Visual composition
B कागज की मोटाई / Thickness of paper
C घंटी की आवाज / Sound of bell
D गोंद की गंध / Smell of glue
Explanation opens after your attempt
Correct Answer
A. दृश्य रचना / Visual composition
Step 1
Concept
Elements of art make visual composition clear and attractive. Exam tip: treat elements as the base of composition.
Step 2
Why this answer is correct
The correct answer is A. दृश्य रचना / Visual composition. Elements of art make visual composition clear and attractive. Exam tip: treat elements as the base of composition.
Step 3
Exam Tip
कला तत्व दृश्य रचना को स्पष्ट और आकर्षक बनाते हैं। परीक्षा में elements को composition की नींव मानें।
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कला के तत्व किसके निर्माण की आधार भाषा हैं?
The elements of art are the basic language for making what?
#art elements
#visual composition
#basics
A दृश्य रचना / Visual composition
B केवल परीक्षा कॉपी / Only exam notebook
C सिर्फ स्कूल घंटी / Only school bell
D कागज की दुकान / Paper shop
Explanation opens after your attempt
Correct Answer
A. दृश्य रचना / Visual composition
Step 1
Concept
Visual composition is made through art elements. Exam tip: understand elements as art language.
Step 2
Why this answer is correct
The correct answer is A. दृश्य रचना / Visual composition. Visual composition is made through art elements. Exam tip: understand elements as art language.
Step 3
Exam Tip
कला तत्वों से दृश्य रचना बनती है। परीक्षा में elements को art language समझें।
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किसी समांतर श्रेढ़ी में सार्व अंतर (d) किससे निकाला जाता है?
In an arithmetic progression, how is the common difference (d) found?
#arithmetic-progression
#ap-basics
#class10
A \(d=a_2-a_1\)
B \(d=a_1+a_2\)
C \(d=a_1a_2\)
D \(d=\frac{a_1}{a_2}\)
Explanation opens after your attempt
Correct Answer
A. \(d=a_2-a_1\)
Step 1
Concept
The common difference is the difference between two consecutive terms. Hence \(d=a_2-a_1\) is correct.
Step 2
Why this answer is correct
The correct answer is A. \(d=a_2-a_1\). The common difference is the difference between two consecutive terms. Hence \(d=a_2-a_1\) is correct.
Step 3
Exam Tip
सार्व अंतर लगातार दो पदों का अंतर होता है। इसलिए \(d=a_2-a_1\) सही है।
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कौन-सा बहुपद (x) में (0) घात का है?
Which polynomial in (x) has degree (0)?
#degree_zero
#constant_polynomial
#basics
A (12)
B (x+12)
C \(x^2+12\)
D (0)
Explanation opens after your attempt
Step 1
Concept
The number (12) is a non-zero constant polynomial and its degree is (0). The degree of the zero polynomial is undefined.
Step 2
Why this answer is correct
The correct answer is A. (12). The number (12) is a non-zero constant polynomial and its degree is (0). The degree of the zero polynomial is undefined.
Step 3
Exam Tip
(12) शून्य से भिन्न स्थिर बहुपद है और इसकी घात (0) है। (0) बहुपद की घात परिभाषित नहीं होती।
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कौन-सा व्यंजक (x) में बहुपद है?
Which expression is a polynomial in (x)?
#polynomial_identification
#fraction_coefficient
#basics
A \(x^{\frac{3}{2}}+1\)
B \(x^2+\frac{1}{3}x+2\)
C \(\frac{1}{x^2}+1\)
D \(\sqrt{x^3}+2\)
Explanation opens after your attempt
Correct Answer
B. \(x^2+\frac{1}{3}x+2\)
Step 1
Concept
In \(x^2+\frac{1}{3}x+2\), the powers of (x) are (2), (1), and (0). So it is a polynomial.
Step 2
Why this answer is correct
The correct answer is B. \(x^2+\frac{1}{3}x+2\). In \(x^2+\frac{1}{3}x+2\), the powers of (x) are (2), (1), and (0). So it is a polynomial.
Step 3
Exam Tip
\(x^2+\frac{1}{3}x+2\) में (x) की घातें (2), (1) और (0) हैं। इसलिए यह बहुपद है।
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कौन-सा कथन (p(x)=0) के लिए सही है?
Which statement is correct for (p(x)=0)?
#zero_polynomial
#classification
#basics
A यह शून्य बहुपद है / It is the zero polynomial
B यह रैखिक बहुपद है / It is a linear polynomial
C यह द्विघात बहुपद है / It is a quadratic polynomial
D यह घन बहुपद है / It is a cubic polynomial
Explanation opens after your attempt
Correct Answer
A. यह शून्य बहुपद है / It is the zero polynomial
Step 1
Concept
(p(x)=0) is called the zero polynomial. Its degree is undefined.
Step 2
Why this answer is correct
The correct answer is A. यह शून्य बहुपद है / It is the zero polynomial. (p(x)=0) is called the zero polynomial. Its degree is undefined.
Step 3
Exam Tip
(p(x)=0) को शून्य बहुपद कहते हैं। इसकी घात परिभाषित नहीं होती।
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बहुपद (p(x)=3x-2 +4x+5) में कुल कितने गुणांक हैं जब इसे \(ax^2+bx+c\) रूप में देखें?
How many coefficients are there in (p(x)=3x-2 +4x+5) when viewed as \(ax^2+bx+c\)?
#coefficients
#quadratic_polynomial
#basics
A (1)
B (2)
C (3)
D (4)
Explanation opens after your attempt
Step 1
Concept
In \(ax^2+bx+c\), there are three coefficients (a), (b), and (c). Here they are (3), (4), and (5).
Step 2
Why this answer is correct
The correct answer is C. (3). In \(ax^2+bx+c\), there are three coefficients (a), (b), and (c). Here they are (3), (4), and (5).
Step 3
Exam Tip
\(ax^2+bx+c\) में (a), (b) और (c) तीन गुणांक होते हैं। यहाँ वे (3), (4) और (5) हैं।
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कौन-सा बहुपद स्थिर बहुपद है?
Which polynomial is a constant polynomial?
#constant_polynomial
#classification
#basics
A (3x+2)
B \(x^2-1\)
C \(-7\)
D \(x^3\)
Explanation opens after your attempt
Step 1
Concept
A constant polynomial has no variable. The number (-7) is a non-zero constant polynomial.
Step 2
Why this answer is correct
The correct answer is C. \(-7\). A constant polynomial has no variable. The number (-7) is a non-zero constant polynomial.
Step 3
Exam Tip
स्थिर बहुपद में चर नहीं होता। (-7) शून्य से भिन्न स्थिर बहुपद है।
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\(\frac{x^2+1}{2}\) के बारे में कौन-सा कथन सही है?
Which statement is correct about \(\frac{x^2+1}{2}\)?
#real_coefficients
#polynomial_identification
#basics
A यह बहुपद है / It is a polynomial
B यह बहुपद नहीं है / It is not a polynomial
C इसमें दो चर हैं / It has two variables
D इसकी घात परिभाषित नहीं है / Its degree is undefined
Explanation opens after your attempt
Correct Answer
A. यह बहुपद है / It is a polynomial
Step 1
Concept
\(\frac{x^2+1}{2}=\frac{1}{2}x^2+\frac{1}{2}\) and the coefficients are real. So it is a polynomial.
Step 2
Why this answer is correct
The correct answer is A. यह बहुपद है / It is a polynomial. \(\frac{x^2+1}{2}=\frac{1}{2}x^2+\frac{1}{2}\) and the coefficients are real. So it is a polynomial.
Step 3
Exam Tip
\(\frac{x^2+1}{2}=\frac{1}{2}x^2+\frac{1}{2}\) है और गुणांक वास्तविक हैं। इसलिए यह बहुपद है।
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बहुपद (p(t)=8t-2 -3t+4) में चर कौन-सा है?
Which is the variable in the polynomial (p(t)=8t-2 -3t+4)?
#variable
#polynomial_notation
#basics
A (p)
B (t)
C (8)
D (4)
Explanation opens after your attempt
Step 1
Concept
In (p(t)), the changing symbol is (t). So the variable is (t).
Step 2
Why this answer is correct
The correct answer is B. (t). In (p(t)), the changing symbol is (t). So the variable is (t).
Step 3
Exam Tip
(p(t)) में बदलने वाला चिन्ह (t) है। इसलिए चर (t) है।
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बहुपद (p(x)=x-2 -5x+6) के लिए (p(2)) का मान क्या है?
For (p(x)=x-2 -5x+6), what is the value of (p(2))?
#evaluation
#polynomial_value
#basics
A (0)
B (2)
C \(-2\)
D (6)
Explanation opens after your attempt
Step 1
Concept
(p(2)=22 -5(2)+6=0). In exams, keep the sign of the negative term carefully.
Step 2
Why this answer is correct
The correct answer is A. (0). (p(2)=22 -5(2)+6=0). In exams, keep the sign of the negative term carefully.
Step 3
Exam Tip
(p(2)=22 -5(2)+6=0)। परीक्षा में ऋणात्मक पद का चिह्न ध्यान से रखें।
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स्थिर बहुपद (p(x)=9) की घात क्या है?
What is the degree of the constant polynomial (p(x)=9)?
#constant_polynomial
#degree
#basics
A (0)
B (1)
C (9)
D परिभाषित नहीं / Undefined
Explanation opens after your attempt
Step 1
Concept
A non-zero constant polynomial has degree (0). The number (9) may be written as \(9x^0\).
Step 2
Why this answer is correct
The correct answer is A. (0). A non-zero constant polynomial has degree (0). The number (9) may be written as \(9x^0\).
Step 3
Exam Tip
शून्य से भिन्न स्थिर बहुपद की घात (0) होती है। (9) को \(9x^0\) माना जा सकता है।
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बहुपद \(7x^2+5x-11\) में स्थिर पद क्या है?
What is the constant term in the polynomial \(7x^2+5x-11\)?
#constant_term
#polynomials
#basics
A (7)
B (5)
C \(-11\)
D (2)
Explanation opens after your attempt
Correct Answer
C. \(-11\)
Step 1
Concept
The constant term is the term without (x). Here the constant term is (-11).
Step 2
Why this answer is correct
The correct answer is C. \(-11\). The constant term is the term without (x). Here the constant term is (-11).
Step 3
Exam Tip
स्थिर पद वह होता है जिसमें (x) नहीं होता। यहाँ स्थिर पद (-11) है।
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यदि \(3^{x+2}=243\) है तो (x) का मान क्या है?
If \(3^{x+2}=243\), what is the value of (x)?
#polynomials
#exponential equation
#basics
A (2)
B (3)
C (4)
D (5)
Explanation opens after your attempt
Step 1
Concept
Since \(243=3^5\), (x+2=5). This gives (x=3).
Step 2
Why this answer is correct
The correct answer is B. (3). Since \(243=3^5\), (x+2=5). This gives (x=3).
Step 3
Exam Tip
क्योंकि \(243=3^5\), इसलिए (x+2=5) है। इससे (x=3) मिलता है।
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यदि \(2^{x+1}=64\) है तो (x) का मान क्या है?
If \(2^{x+1}=64\), what is the value of (x)?
#polynomials
#exponential equation
#basics
A (4)
B (5)
C (6)
D (7)
Explanation opens after your attempt
Step 1
Concept
Since \(64=2^6\), (x+1=6). This gives (x=5).
Step 2
Why this answer is correct
The correct answer is B. (5). Since \(64=2^6\), (x+1=6). This gives (x=5).
Step 3
Exam Tip
क्योंकि \(64=2^6\), इसलिए (x+1=6) है। इससे (x=5) मिलता है।
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यदि \(2^x=32\) है तो (x) का मान क्या है?
If \(2^x=32\), what is the value of (x)?
#polynomials
#exponential equation
#basics
A (4)
B (5)
C (6)
D (16)
Explanation opens after your attempt
Step 1
Concept
Since \(32=2^5\), \(2^x=2^5\) gives (x=5). Equal bases have equal exponents.
Step 2
Why this answer is correct
The correct answer is B. (5). Since \(32=2^5\), \(2^x=2^5\) gives (x=5). Equal bases have equal exponents.
Step 3
Exam Tip
क्योंकि \(32=2^5\), इसलिए \(2^x=2^5\) से (x=5)। समान आधार होने पर घातें बराबर होती हैं।
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(6x+7y+4) में पदों की संख्या कितनी है?
How many terms are there in (6x+7y+4)?
#polynomials
#terms
#basics
A (1)
B (2)
C (3)
D (4)
Explanation opens after your attempt
Step 1
Concept
The expression has three terms: (6x), (7y), and (4). Identify terms by plus or minus signs.
Step 2
Why this answer is correct
The correct answer is C. (3). The expression has three terms: (6x), (7y), and (4). Identify terms by plus or minus signs.
Step 3
Exam Tip
इस व्यंजक में (6x), (7y) और (4) तीन पद हैं। पदों को जोड़ या घटाव से अलग पहचानें।
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\(3^{-2}\) किसके बराबर है?
What is \(3^{-2}\) equal to?
#polynomials
#negative exponent
#basics
A \(\frac{1}{9}\)
B (9)
C (-9)
D \(\frac{1}{6}\)
Explanation opens after your attempt
Correct Answer
A. \(\frac{1}{9}\)
Step 1
Concept
A negative exponent moves the base to the denominator, so \(3^{-2}=\frac{1}{3^2}=\frac{1}{9}\). A negative exponent does not mean a negative answer.
Step 2
Why this answer is correct
The correct answer is A. \(\frac{1}{9}\). A negative exponent moves the base to the denominator, so \(3^{-2}=\frac{1}{3^2}=\frac{1}{9}\). A negative exponent does not mean a negative answer.
Step 3
Exam Tip
ऋणात्मक घात आधार को हर में ले जाती है इसलिए \(3^{-2}=\frac{1}{3^2}=\frac{1}{9}\)। ऋणात्मक घात का अर्थ ऋणात्मक उत्तर नहीं होता।
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(4x+5y+2) में पदों की संख्या कितनी है?
How many terms are there in (4x+5y+2)?
#polynomials
#terms
#basics
A (1)
B (2)
C (3)
D (4)
Explanation opens after your attempt
Step 1
Concept
The expression has three terms: (4x), (5y), and (2). Separate terms by plus or minus signs.
Step 2
Why this answer is correct
The correct answer is C. (3). The expression has three terms: (4x), (5y), and (2). Separate terms by plus or minus signs.
Step 3
Exam Tip
इस व्यंजक में (4x), (5y) और (2) तीन पद हैं। पदों को जोड़ या घटाव से अलग करें।
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\(2^{-3}\) किसके बराबर है?
What is \(2^{-3}\) equal to?
#polynomials
#negative exponent
#basics
A \(\frac{1}{8}\)
B (8)
C (-8)
D \(\frac{1}{6}\)
Explanation opens after your attempt
Correct Answer
A. \(\frac{1}{8}\)
Step 1
Concept
A negative exponent moves the base to the denominator, so \(2^{-3}=\frac{1}{2^3}=\frac{1}{8}\). A negative exponent does not mean a negative answer.
Step 2
Why this answer is correct
The correct answer is A. \(\frac{1}{8}\). A negative exponent moves the base to the denominator, so \(2^{-3}=\frac{1}{2^3}=\frac{1}{8}\). A negative exponent does not mean a negative answer.
Step 3
Exam Tip
ऋणात्मक घात में संख्या हर में चली जाती है इसलिए \(2^{-3}=\frac{1}{2^3}=\frac{1}{8}\)। ऋणात्मक घात का अर्थ ऋणात्मक उत्तर नहीं है।
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(2x+3y) में पदों की संख्या कितनी है?
How many terms are there in (2x+3y)?
#polynomials
#terms
#basics
A (1)
B (2)
C (3)
D (5)
Explanation opens after your attempt
Step 1
Concept
In (2x+3y), the two terms are (2x) and (3y). Identify terms by plus or minus signs.
Step 2
Why this answer is correct
The correct answer is B. (2). In (2x+3y), the two terms are (2x) and (3y). Identify terms by plus or minus signs.
Step 3
Exam Tip
(2x+3y) में (2x) और (3y) दो पद हैं। पदों को जोड़ या घटाव के चिह्न से अलग पहचानें।
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कौन सी संख्या परिमेय संख्या है?
Which number is a rational number?
#rational-numbers
#real-numbers
#basics
A \(\frac{5}{8}\)
B \(\sqrt{3}\)
C \(\sqrt{5}\)
D \(\pi\)
Explanation opens after your attempt
Correct Answer
A. \(\frac{5}{8}\)
Step 1
Concept
\(\frac{5}{8}\) is a ratio of two integers. A rational number can be written as \(\frac{p}{q}\).
Step 2
Why this answer is correct
The correct answer is A. \(\frac{5}{8}\). \(\frac{5}{8}\) is a ratio of two integers. A rational number can be written as \(\frac{p}{q}\).
Step 3
Exam Tip
\(\frac{5}{8}\) दो पूर्णांकों का अनुपात है। परिमेय संख्या को \(\frac{p}{q}\) रूप में लिखा जाता है।
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कौन सा विकल्प (a=5q+r) में (r) का वैध मान नहीं हो सकता?
Which option cannot be a valid value of (r) in (a=5q+r)?
#euclids-division-lemma
#invalid-remainder
#basics-hard
A 0
B 2
C 4
D 5
Explanation opens after your attempt
Step 1
Concept
In (a=5q+r), the remainder must satisfy \(0\le r<5\).
Step 2
Why this answer is correct
5 is equal to the divisor, so it cannot be a remainder.
Step 3
Exam Tip
Valid remainders start from 0 and end at one less than the divisor. चरण 1: (a=5q+r) में शेषफल की सीमा \(0\le r<5\) है। चरण 2: 5 भाजक के बराबर है, इसलिए यह शेषफल नहीं हो सकता। चरण 3: वैध शेषफल 0 से शुरू होता है और भाजक से एक कम पर खत्म होता है।
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