Chemistry MCQs - MCQs For Tests

There is no change in energy level They become stationary There is an increase in energy They are gaining kinetic energy

(A) The reaction between iron and oxygen is endothermic.

(B) As compared to iron, aluminium has a greater affinity for oxygen

(D) Refraction between aluminium and oxygen is endothermic

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When electrons revolve in stationary orbits,

(A) There is no change in energy level

(B) They become stationary

(D) They are gaining kinetic energy

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The alkali metal which is liquid at 15

(A) K

(B) Na

(D) None

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Hypo is used to photography for

(A) Picture printed

(B) The fixation of the picture

(D) Developing picture

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Hydrogen chloride molecule contains

(A) Electrovalent bond

(B) Double bond

(D) Covalent bond

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Which of the following alcohols cannot be produced by treatment of aldehydes or ketones with NaBH4or LiAIH4?

(A) 2-Methyl-2-propanol

(B) 1-Propanol

(D) 2-Propanol

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An electrolyte

(A) Gives ions only when dissolved in water

(B) Possesses ions even in solid-state

(D) Forms complex ions in solution

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The number of oxygen atoms in 4.4 g of CO2 is approximately

(A) 6 x 10²²

(B) 1.2 x 10²³

(D) 6 x 10²³

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In public urinals, we observe some nascent smell. This smell is due to

(A) Hydrogen present in the air reacts with nitrogen forming NH₃

(B) Formation of sulphonic acid by urea of urine

(C) Hydrolysis of urea of urine by urease of atmosphere into NH₃and CO₂

(D) The reaction of CO₂of atmosphere with urea mononitrate in urine

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What happens when isotonic solution of a (mol. wt. 342) and B (mol. wt 60) are put in to communication through semiperme-able membrane?

(A) Change in temperature of solutions takes place.

(B) Transference of solvent from solution A to that of B take place

(D) No transference of solvent from solution A to that of B takes place

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