Concept-wise Practice

element_vs_subset MCQ Questions for Class 11

element_vs_subset se related questions ko ek jagah revise karein. Har question me bilingual content, answer feedback aur explanation available hai.

Practice Questions

14 questions tagged with element_vs_subset.

यदि \(A=\{1,2,3\}\), तो कथन \({1}\in P(A)\) और \({1}\subseteq P(A)\) में कौन सा सही है?

If \(A=\{1,2,3\}\), which is correct between \({1}\in P(A)\) and \({1}\subseteq P(A)\)?

Explanation opens after your attempt
Correct Answer

A. केवल \({1}\in P(A)\) सही हैOnly \({1}\in P(A)\) is correct

Step 1

Concept

({1}) is a subset of (A), so it is an element of (P(A)). But (1) is not an element of (P(A)), so \({1}\subseteq P(A)\) is false.

Step 2

Why this answer is correct

The correct answer is A. केवल \({1}\in P(A)\) सही है / Only \({1}\in P(A)\) is correct. ({1}) is a subset of (A), so it is an element of (P(A)). But (1) is not an element of (P(A)), so \({1}\subseteq P(A)\) is false.

Step 3

Exam Tip

({1}) समुच्चय (A) का उपसमुच्चय है, इसलिए वह (P(A)) का अवयव है। लेकिन (1), (P(A)) का अवयव नहीं है, इसलिए \({1}\subseteq P(A)\) गलत है।

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यदि \(A=\{1,{1},{1,2}\}\), तो निम्न में से कौन (A) का उपसमुच्चय है?

If \(A=\{1,{1},{1,2}\}\), which of the following is a subset of (A)?

Explanation opens after your attempt
Correct Answer

A. ({1,{1,2}})

Step 1

Concept

Both (1) and ({1,2}) in the option are elements of (A). Treat ({1,2}) as one element of (A), not two separate elements.

Step 2

Why this answer is correct

The correct answer is A. ({1,{1,2}}). Both (1) and ({1,2}) in the option are elements of (A). Treat ({1,2}) as one element of (A), not two separate elements.

Step 3

Exam Tip

विकल्प में (1) और ({1,2}) दोनों (A) के तत्व हैं। ({1,2}) को (A) का तत्व समझें, दो अलग तत्व नहीं।

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यदि \(A=\{1,3,5\}\) है तो ({1,5}) किसका तत्व है?

If \(A=\{1,3,5\}\) then ({1,5}) is an element of which set?

Explanation opens after your attempt
Correct Answer

B. (\mathcal{P}(A))

Step 1

Concept

({1,5}) is a subset of (A) but not a direct element of (A). So it is an element of (\mathcal{P}(A)).

Step 2

Why this answer is correct

The correct answer is B. (\mathcal{P}(A)). ({1,5}) is a subset of (A) but not a direct element of (A). So it is an element of (\mathcal{P}(A)).

Step 3

Exam Tip

({1,5}) (A) का उपसमुच्चय है लेकिन (A) का सीधा तत्व नहीं है। इसलिए यह (\mathcal{P}(A)) का तत्व है।

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यदि \(A={\varnothing,{2},2}\), तो निम्न में से कौन सा कथन सही है?

If \(A={\varnothing,{2},2}\), which of the following statements is correct?

Explanation opens after your attempt
Correct Answer

A. \({2}\in A\) और \({2}\subset A\) दोनों सत्य हैंBoth \({2}\in A\) and \({2}\subset A\) are true

Step 1

Concept

({2}) is an element of (A), and 2 is also in (A), so \({2}\subset A\) is also true. Keep the difference between \(\in\) and \(\subset\) clear.

Step 2

Why this answer is correct

The correct answer is A. \({2}\in A\) और \({2}\subset A\) दोनों सत्य हैं / Both \({2}\in A\) and \({2}\subset A\) are true. ({2}) is an element of (A), and 2 is also in (A), so \({2}\subset A\) is also true. Keep the difference between \(\in\) and \(\subset\) clear.

Step 3

Exam Tip

({2}) (A) का अवयव है और 2 भी (A) में है, इसलिए \({2}\subset A\) भी सत्य है। \(\in\) और \(\subset\) का अंतर ध्यान रखें।

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यदि \(A=\{1,2,3\}\) और (B=P(A)) है तो निम्न में से कौन (B) का अवयव नहीं है?

If \(A=\{1,2,3\}\) and (B=P(A)), which of the following is not an element of (B)?

Explanation opens after your attempt
Correct Answer

D. (2)

Step 1

Concept

The elements of (P(A)) are subsets of (A), and (2) itself is not a subset. ({2}) and (2) are different.

Step 2

Why this answer is correct

The correct answer is D. (2). The elements of (P(A)) are subsets of (A), and (2) itself is not a subset. ({2}) and (2) are different.

Step 3

Exam Tip

(P(A)) के अवयव (A) के उपसमुच्चय होते हैं और (2) स्वयं उपसमुच्चय नहीं है। ({2}) और (2) अलग हैं।

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यदि \(A=\{1,2\}\) और \(B=\{{1,2}\}\) हैं तो कौन सा कथन सही है?

If \(A=\{1,2\}\) and \(B=\{{1,2}\}\), which statement is correct?

Explanation opens after your attempt
Correct Answer

B. \(A\in B\)

Step 1

Concept

The only element of (B) is the whole set ({1,2}). Be careful with subset and element symbols.

Step 2

Why this answer is correct

The correct answer is B. \(A\in B\). The only element of (B) is the whole set ({1,2}). Be careful with subset and element symbols.

Step 3

Exam Tip

(B) का एकमात्र अवयव पूरा समुच्चय ({1,2}) है। उपसमुच्चय और अवयव के चिन्ह में सावधानी रखें।

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यदि \(A={\varnothing,1}\) है तो कौन सा कथन सत्य है?

If \(A={\varnothing,1}\) then which statement is true?

Explanation opens after your attempt
Correct Answer

A. \(\varnothing\in A\)

Step 1

Concept

Here the empty set is one element of (A). Also, (A) is a subset of itself.

Step 2

Why this answer is correct

The correct answer is A. \(\varnothing\in A\). Here the empty set is one element of (A). Also, (A) is a subset of itself.

Step 3

Exam Tip

यहां रिक्त समुच्चय (A) का एक अवयव है। साथ ही (A) स्वयं अपना उपसमुच्चय होता है।

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यदि \(A=\{1,2,3\}\) है तो निम्न में से कौन सा कथन सत्य है?

If \(A=\{1,2,3\}\) then which of the following statements is true?

Explanation opens after your attempt
Correct Answer

A. \(1\in A\) और \({1}\subseteq A\)\(1\in A\) and \({1}\subseteq A\)

Step 1

Concept

(1) is an element and ({1}) is a subset. Do not confuse \(\in\) and \(\subseteq\).

Step 2

Why this answer is correct

The correct answer is A. \(1\in A\) और \({1}\subseteq A\) / \(1\in A\) and \({1}\subseteq A\). (1) is an element and ({1}) is a subset. Do not confuse \(\in\) and \(\subseteq\).

Step 3

Exam Tip

(1) अवयव है और ({1}) उपसमुच्चय है। \(\in\) और \(\subseteq\) के प्रयोग में गलती न करें।

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यदि \(A=\{1,2,{3}\}\) है तो कौन सा (A) का अवयव है?

If \(A=\{1,2,{3}\}\) then which is an element of (A)?

Explanation opens after your attempt
Correct Answer

A. ({3})

Step 1

Concept

({3}) is one whole element while (3) is not separately listed. Keep element and subset different.

Step 2

Why this answer is correct

The correct answer is A. ({3}). ({3}) is one whole element while (3) is not separately listed. Keep element and subset different.

Step 3

Exam Tip

({3}) पूरा एक अवयव है जबकि (3) अलग से अवयव नहीं है। अवयव और उपसमुच्चय का अंतर ध्यान रखें।

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यदि \(A=\{1,2\}\) है, तो इनमें से कौन सा (P(A)) का अवयव है?

If \(A=\{1,2\}\), which of the following is an element of (P(A))?

Explanation opens after your attempt
Correct Answer

A. ({1})

Step 1

Concept

(P(A)) contains all subsets of (A) as its elements.

Step 2

Why this answer is correct

({1}) is a subset of (A), so it is an element of (P(A)).

Step 3

Exam Tip

Always distinguish between (1) and ({1}). चरण 1: (P(A)) में (A) के सभी उपसमुच्चय अवयव बनते हैं। चरण 2: ({1}), (A) का उपसमुच्चय है, इसलिए यह (P(A)) का अवयव है। चरण 3: (1) और ({1}) में अंतर अवश्य पहचानें।

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समुच्चय \(A={\varnothing,{1},2}\) के लिए कौन-सा कथन सही है?

For the set \(A={\varnothing,{1},2}\), which statement is correct?

Explanation opens after your attempt
Correct Answer

A. \(\varnothing\in A\)\(\varnothing\) belongs to (A)

Step 1

Concept

Anything written directly as an element of a set belongs to that set.

Step 2

Why this answer is correct

Here \(\varnothing\) is directly listed inside (A), so \(\varnothing\in A\) is correct.

Step 3

Exam Tip

Exam tip: carefully distinguish between \(\varnothing\) and \({\varnothing}\). चरण 1: किसी समुच्चय में जो चीज सीधे अवयव के रूप में लिखी हो, वह उस समुच्चय की सदस्य होती है। चरण 2: यहाँ \(\varnothing\) सीधे (A) के अंदर लिखा है, इसलिए \(\varnothing\in A\) सही है। चरण 3: परीक्षा संकेत: \(\varnothing\) और \({\varnothing}\) में अंतर ध्यान से समझें।

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यदि \(A=\{a,b\}\), तो कौन-सा कथन सही है?

If \(A=\{a,b\}\), which statement is correct?

Explanation opens after your attempt
Correct Answer

A. \({a}\subseteq A\)

Step 1

Concept

({a}) is a set whose only element is (a).

Step 2

Why this answer is correct

Since (a) is in (A), \({a}\subseteq A\) is correct.

Step 3

Exam Tip

Exam tip: understand the difference between the element (a) and the set ({a}). चरण 1: ({a}) एक समुच्चय है जिसका अकेला अवयव (a) है। चरण 2: (a), (A) में है, इसलिए \({a}\subseteq A\) सही है। चरण 3: परीक्षा संकेत: अवयव (a) और समुच्चय ({a}) में अंतर समझें।

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समुच्चय \(A=\{1,2,{3}\}\) के लिए कौन-सा कथन सही है?

For the set \(A=\{1,2,{3}\}\), which statement is correct?

Explanation opens after your attempt
Correct Answer

A. \({3}\in A\)({3}) is an element of (A)

Step 1

Concept

The elements of (A) are (1), (2), and ({3}).

Step 2

Why this answer is correct

Here (3) alone is not an element; the whole set ({3}) is one element.

Step 3

Exam Tip

When a set is written inside another set, distinguish element notation from subset notation carefully. चरण 1: (A) के सदस्य (1), (2) और ({3}) हैं। चरण 2: यहाँ (3) अलग सदस्य नहीं है, बल्कि ({3}) पूरा एक सदस्य है। चरण 3: समुच्चय के अंदर लिखे छोटे समुच्चय को सदस्य और उपसमुच्चय के रूप में सावधानी से पहचानें।

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यदि \(A=\{1,2\}\) और \(B=\{1,2,{1,2}\}\) हैं, तो कौन-सा कथन सही है?

If \(A=\{1,2\}\) and \(B=\{1,2,{1,2}\}\), which statement is correct?

Explanation opens after your attempt
Correct Answer

A. \(A\subseteq B\) और \(A\in B\) दोनोंBoth \(A\subseteq B\) and \(A\in B\)

Step 1

Concept

Both (1) and (2) are in (B), so \(A\subseteq B\).

Step 2

Why this answer is correct

({1,2}) is also an element of (B), so \(A\in B\).

Step 3

Exam Tip

In such questions, check subset and element relations separately. चरण 1: (1) और (2), दोनों (B) में हैं, इसलिए \(A\subseteq B\)। चरण 2: ({1,2}) भी (B) का एक अवयव है, इसलिए \(A\in B\)। चरण 3: ऐसे प्रश्नों में उपसमुच्चय और अवयव दोनों अलग-अलग जाँचें।

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