Give the common name for the following compound (CH\(_{3}\))\(_{2}\) CH CH\(_{2}\) -Br
Відповідь
(A)
Isobutyl bromide
2
The enzyme that converts glucose to ethyl alcohol is?
Відповідь
(B)
zymase
3
The scientist who stated that matter can be converted into energy is?
Відповідь
(D)
Einstein
4
What is the IUPAC name for the following compound? HC\(\equiv\)CCH\(_{3}\)
Відповідь
(B)
Methyl acetylene
5
What is the chemical name for the compound CuCO\(_{3}\)?
Відповідь
(B)
Copper (ii) carbonate
6
A 'breath test' used by traffic police to check drunken driving uses?
Відповідь
(D)
Potassium dichromatic-sulphuric acid
7
Which one of the following is not a mixture?
Відповідь
(B)
Mercury
8
Which of the following is a non-metal that remains liquid at room temperature?
Відповідь
(C)
Bromine
9
Which of the following are chemical changes?
I. cooking of food
II. digestion of food
III. freezing of water
IV. water is heated up
Відповідь
(A)
I and II
10
The atomic weight of nitrogen is?
Відповідь
(C)
14
11
The gas which causes global warming is?
Відповідь
(B)
CO\(_{2}\)
12
Oxygen is absent in?
Відповідь
(A)
Kerosene
13
A sample of any of the following substances disappears after some time when exposed to air like camphor, naphthalene, or dry ice. This phenomenon is called?
Відповідь
(A)
Sublimation
14
The maximum electron in N shell is?
Відповідь
(D)
32
15
Neutrons were discovered by?
Відповідь
(A)
James Chadwick
16
Which of the following is a form of calcium carbonate?
I. limestone
II. marble
III. chalk
Iv. egg-shells
Відповідь
(D)
I, II, III, and IV
17
Soaps clean surfaces on the principle based on?
Відповідь
(D)
surface tension
18
The reactivity of fluorine is due to?
Відповідь
(A)
its high electro negativity
19
The mass number of a nucleus is?
Відповідь
(B)
The sum of the number of protons and neutrons present in the nucleus
20
The mass of one Avogadro number of helium atoms is?
Відповідь
(B)
4.00gram
21
220g of carbon dioxide contains ----- moles
Відповідь
(A)
5
22
The inherited traits of an organism are controlled by?
Відповідь
(C)
DNA molecules
23
The most abundant rare gas in the atmosphere is?
Відповідь
(C)
Ar
24
The heat required to raise the temperature of the body by 1k is called?
Відповідь
(B)
Thermal capacity
25
The nucleus of a hydrogen atom consist of a?
Відповідь
(A)
1 proton only
26
The metal used to recover copper from a solution of copper sulphate is?
Відповідь
(D)
Fe
27
The nucleus of an atom consists of?
Відповідь
(C)
Protons and neutrons
28
A solution contains 20g of solute in 180g of solvent. If the solvent is water, what is the concentration of the solution in terms of mass by mass percentage
Відповідь
(C)
10%
29
The only metal that is anti-bacterial is?
Відповідь
(D)
Copper
30
An element having the atomic number 17 will resemble which of the following elements having atomic number as given below?
Відповідь
(B)
35
31
A chemical process in which there is a gain of electrons is known as?
Відповідь
(B)
Reduction
32
The reactions involving simultaneous oxidation and reduction?
Відповідь
(D)
Redox reactions
33
A binary compound of oxygen with another element is referred to as?
Відповідь
(A)
Oxide
34
The process or act of extracting a metal from its ore and refining it is called?
Відповідь
(C)
Mettallurgy
35
The compounds made up of only carbon and hydrogen are called?
