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Chemistry MCQ Question - Basic Concept

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1 Combustion analysis is performed to determine
✅ Correct Answer: 1
2 Mostly elements have fractional atomic masses because of
✅ Correct Answer: 3
3 Isotopes differ in
✅ Correct Answer: 1
4 Which of the following is not a macromolecule?
✅ Correct Answer: 4
5 Which of the following methods is used to estimate hydrogen in an organic compound?
✅ Correct Answer: 1
6 Isotopes of the same elements has
✅ Correct Answer: 3
7 The nucleus of an atom of every element will always contain
✅ Correct Answer: 3
8 When cationic molecular ions are allowed to pass through strong magnetic field in mass spectrometer which of the following ions is fallen
✅ Correct Answer: 1
9 When 0.5 mole of phosphoric acid is dissolved in aqueous solution how many moles of -ve and +ve ions are collected altogether?
✅ Correct Answer: 4
10 For which of the following compounds the term empirical formula cannot be applied?
✅ Correct Answer: 4
11 Dempsters mass spectrometer has number of zones / parts
✅ Correct Answer: 1
12 The properties of an element mosly corresponds to that isotope which has greater
✅ Correct Answer: 3
13 1 a.m.u =
✅ Correct Answer: 1
14 Which of the following has strongest intermolecular forces of attraction?
✅ Correct Answer: 3
15 Which has strongest bonding in the solid state?
✅ Correct Answer: 4
16 When substance moves from a solid to a liquid state all of the following changes occur except
✅ Correct Answer: 2
17 When the atoms of third layer are arranged in such a way that they directly lie above the atoms of first layer then this arrangement is called
✅ Correct Answer: 1
18 In order to mention the boiling point of water at 110?C the external pressure should be
✅ Correct Answer: 1
19 Which one is false for evaporation?
✅ Correct Answer: 3
20 Vapour pressure of water at 100?C is
✅ Correct Answer: 2
21 Which one of the following does not show hydrogen bonding ?
✅ Correct Answer: 4
22 Liquid crystal is discovered by
✅ Correct Answer: 2
23 Which one is a conductor but is not malleable?
✅ Correct Answer: 2
24 Hydrogen bonding is involved in
✅ Correct Answer: 4
25 Actually the vapour pressure on the surface of liquid in the flask is equal to
✅ Correct Answer: 3
26 Forces of attraction which may be present between all kinds of atoms and molecules are
✅ Correct Answer: 3
27 The density of water may be
✅ Correct Answer: 2
28 The quantity of heat required to convert one mole of liquid into its vapours at its boiling point is called molar heat of
✅ Correct Answer: 1
29 Steam causes more sever burn than the boiling water because it possesses.
✅ Correct Answer: 2
30 Water has maximum density at
✅ Correct Answer: 3
31 The conversion of vapours back into their liquid state is called
✅ Correct Answer: 4
32 Formation of vapours from the surface of a liquid is called
✅ Correct Answer: 2
33 When water freezes at 0?C its density decreases due to
✅ Correct Answer: 3
34 The ttractive forces between the partial positive end of one molecule and partial negative end of other molecule are called
✅ Correct Answer: 1
35 The boiling point increases down the zero group element due to
✅ Correct Answer: 2
36 Vapour pressure is not affected by
✅ Correct Answer: 1
37 Rising of a wetting liquid in a capillary tube is due to
✅ Correct Answer: 3
38 Table salt crystallizes with a
✅ Correct Answer: 2
39 The number of formula units in 29.25g of common salt
✅ Correct Answer: 2
40 During which process empty spaces between particles become minimum?
✅ Correct Answer: 2
41 Liquid gets the shape of the container when it is poured into it. Which one of the following reasons justifies it?
✅ Correct Answer: 4
42 Which one of the following has highest volatility
✅ Correct Answer: 1
43 Molar heat of vaporization of water is
✅ Correct Answer: 1
44 If we provide very high amount of heat to a liquid its boiling point will
✅ Correct Answer: 2
45 Crystallites are present in
✅ Correct Answer: 2
46 A solid may be made up of
✅ Correct Answer: 4
47 A malleable solid is one which can be
✅ Correct Answer: 2
48 Amorphous substances posses
✅ Correct Answer: 3
49 Crystalline solids can be identified easily from their
✅ Correct Answer: 1
50 Boiling points of hydrocarbons increase with the increase in number of carbon atoms. It is mainly due to
✅ Correct Answer: 2
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