Practice focused topic-wise MCQs with answers and explanations for quick revision and exam preparation.
Difficulty select karke sirf is topic ke focused MCQs practice karein. Score, timer aur explanations student-friendly flow me milenge.
Showing 521-530 of 1900 questions.
What is the chemical name of common salt?
B. सोडियम क्लोराइडSodium chloride
Common salt is used in food.
Its chemical name is sodium chloride.
It is a raw material for many useful chemicals.
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What is the process of electrolysis of brine called?
B. क्लोर क्षार प्रक्रियाChlor-alkali process
Brine is an aqueous solution of sodium chloride.
Its electrolysis forms chlorine, hydrogen, and sodium hydroxide.
This industrial process is called the chlor-alkali process.
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Which gas is formed at the anode in the chlor-alkali process?
C. क्लोरीनChlorine
The chlor-alkali process involves electrolysis of brine.
Chlorine gas is produced at the anode.
Hydrogen is produced at the cathode, so remember both electrodes.
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Which gas is formed at the cathode in the chlor-alkali process?
A. हाइड्रोजनHydrogen
The chlor-alkali process gives several products from brine.
Hydrogen gas is formed at the cathode.
Make a table of anode and cathode products for revision.
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Which substance is mainly used to prepare bleaching powder?
A. सूखा बुझा हुआ चूना और क्लोरीनDry slaked lime and chlorine
Bleaching powder is a chlorine-related product.
It is made by passing chlorine over dry slaked lime.
Both its preparation and uses are important for exams.
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For which purpose is bleaching powder used?
A. जल को कीटाणुरहित करने मेंDisinfecting water
Bleaching powder has disinfecting properties.
It is used to disinfect drinking water.
It is also used for bleaching in textile and paper industries.
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What is the chemical name of baking soda?
C. सोडियम हाइड्रोजन कार्बोनेटSodium hydrogen carbonate
Baking soda is useful in cooking and medicine.
Its chemical name is sodium hydrogen carbonate.
Do not confuse baking soda with washing soda.
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What is generally mixed with baking soda in baking powder?
A. हल्का खाद्य अम्लMild edible acid
Baking powder contains baking soda and a mild edible acid.
On heating, carbon dioxide is released and makes cakes rise.
Baking soda alone can give a bitter taste.
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Which gas released from baking powder helps cakes and bread rise?
C. कार्बन डाइऑक्साइडCarbon dioxide
Baking powder reacts on heating.
It releases carbon dioxide gas.
The gas bubbles make the dough or batter light and fluffy.
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What is the chemical name of washing soda?
B. सोडियम कार्बोनेट दशजलSodium carbonate decahydrate
Washing soda is useful for washing clothes and softening hard water.
Its chemical name is sodium carbonate decahydrate.
Decahydrate means it contains ten molecules of water of crystallisation.
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