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Chemistry

Chemistry
Which of the following is not present in RNA

Uracil
Phosphate
Ribose
Thymine

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Chemistry
The number of electrons presents in H+ is

three
two
one
zero

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Chemistry
The ionisation energy of hydrogen atom in the ground state is x KJ. The energy required for an electron to jump from 2nd orbit to 3rd orbit is

5x
5x/36
x/6
7.2 x

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Chemistry
Element 106 was discovered by

Seaborg
Rutherford
Kurchatove
Lawrence

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Chemistry
Aquaregia is a mixture of the following in the ratio 1 : 3 by volume

Conc. HNO3 and conc. H2SO4
Dil. HCl and dil. HNO3
Conc. HCl and conc. HNO3
Conc. HNO3 and conc. HCl

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Chemistry
Cyanide poisoning causes death in seconds because

It causes cardiac arrest
It breaks the electron transport chain
It denatures enzymes of the heart/muscle
It causes Lysis of red blood cells

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MORE MCQ ON Chemistry

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