Recent questions tagged Class-12

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The biodegradable polymer is : A. Buna-S B. nylon-6,6 C. nylon 2-nylon 6 D. nylon-6 Select the correct answer from above options...

asked Jan 2, 2022 in Education by JackTerrance

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Q: Enzymes that utilize ATP in phosphate transfer require an alkaline erath metal (M) as the cofactor M is

Enzymes that utilize ATP in phosphate transfer require an alkaline erath metal (M) as the cofactor M is A. Sr B. Be C. Mg D. Ca Select the correct answer from above options...

asked Jan 2, 2022 in Education by JackTerrance

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Q: If the rate constant for a first order reaction is k, the time (t) required for the completion of 99% of the reaction is given by :

If the rate constant for a first order reaction is k, the time (t) required for the completion of 99% of the reaction ... 4.606 / k t Select the correct answer from above options...

asked Jan 2, 2022 in Education by JackTerrance

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Q: Which of the following diatomic molecular species has only `pi` bonds according to Molecular orbital Theory

Which of the following diatomic molecular species has only π bonds according to Molecular orbital Theory A. Be2 B. O2 C. N2 D. C2 Select the correct answer from above options...

asked Jan 2, 2022 in Education by JackTerrance

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Q: pH of a saturated solution of `Ca(OH)_(2)` is 9. the solubility product `(K_(sp))` of `Ca(OH)_(2)` is

pH of a saturated solution of C a ( O H ) 2 is 9. the solubility product ( K s p ) of C a ( O H ) 2 is A. ... − 10 D. 0.125 10 − 15 Select the correct answer from above options...

asked Jan 2, 2022 in Education by JackTerrance

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Q: The mixture that forms maximum boiling azeotrope is :

The mixture that forms maximum boiling azeotrope is : A. Heptane + Octane B. Water + Nitric acid C. ... Acetone + Carbon disulphide Select the correct answer from above options...

asked Jan 2, 2022 in Education by JackTerrance

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Q: 4d, 5p, 5f and 6p orbitals are arranged in the order of decreasing energy. The correct option is :

4d, 5p, 5f and 6p orbitals are arranged in the order of decreasing energy. The correct option is : A. 5f gt 6p gt ... gt 5f gt 4d gt 5p Select the correct answer from above options...

asked Jan 2, 2022 in Education by JackTerrance

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Q: Which of the following is an amphoteric hydroxide

Which of the following is an amphoteric hydroxide A. Be(OH2 B. Sr(OH)2 C. Ca(OH)2 D. Mg(OH)2 Select the correct answer from above options...

asked Jan 2, 2022 in Education by JackTerrance

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Q: Which of the following is incorrect statement?

Which of the following is incorrect statement? A. SnF4 is ionic in nature B. PbF4 is covalent in natural C. ... more stable that GeX2 Select the correct answer from above options...

asked Jan 2, 2022 in Education by JackTerrance

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Q: Under isothermal condition, a gas at 300 K expands from 0.1 L to 0.25 L against a constant external pressure of 2 bar. The work done by the gas is : [

Under isothermal condition, a gas at 300 K expands from 0.1 L to 0.25 L against a constant external pressure of 2 ... C. 5kJ D. 25J Select the correct answer from above options...

asked Jan 2, 2022 in Education by JackTerrance