Chemistry - Questions and Answers, General Study (GK)

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21.

Which one of the following statements is correct?

(a)only electrons reside inside the nucleus of an atom

(b)both electrons and protons reside inside the nucleus of an atom

(c)only neutrons reside inside the nucleus of an atom

(d)both protons and neutrons can reside the nucleus of an atom

Comment

Answer is: DNA

22.

Regarding the atom of a chemical element, the magnetic quantum number refers to

(a)orientation

(b)shape

(c)size

(d)spin

Comment

Answer is: ANA

23.

Which one among the following statements about an atom is not correct?

(a)atom always combine to form molecule

(b)atoms are the basic units from which molecules and ions are formed

(c)atoms are always neutral in nature

(d)atoms aggregate in large numbers to form the matter we can see, feel and touch

Comment

Answer is: DNA

24.

In which one of the following is the valence electronic configuration, ns² np³ found?

(a)Carbon

(b)Oxygen

(c)Nitrogen

(d)Argon

Comment

Answer is: CNA

25.

Propagation of light quanta may be described by

(a)photons

(b)protons

(c)neutrons

(d)electrons

Comment

Answer is: ANA

26.

The atomic weights are expressed in terms of atomic mass unit. Which one of the following is used as a standard?

(a)¹H₁

(b)¹²C₆

(c)¹⁶O₈

(d)³⁵C₁₇

Comment

Answer is: BNA

27.

Consider the following four particles
1. Alpha particle
2. Proton
3. Electron
4. Neutron
Which of the following is the correct sequence in which their rest masses increases?

(a)3-4-2-1

(b)4-2-3-1

(d)2-3-1-4

Comment

Answer is: CNA

28.

Which one of the following has the longest wavelengths?

(a)Ultraviolet radiation

(b)γ-radiation

(c)Visible radiation

(d)Infrared radiation

Comment

Answer is: DNA

29.

Which one of the following statements about an atom is not correct?

(a)Atoms always combine to form molecules

(b)Atoms are the basic units form

(c)Atoms are always neutral in nature

(d)Atoms aggregate in large numbers to form the matter that we can see feel and touch

Comment

Answer is: DNA

30.

Nuclear fission is caused by the impact of

(a)Proton

(b)electron

(c)neutron

(d)None of these

Comment

Answer is: CNA

Comments

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Luther On 12.07.2017. 00:04

Chemistry - Questions and AnswersPage 3

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