Friday Science Quiz #6

Good morning everyone, How is your Preparation going for UPSC IAS Prelims examination 2016? Are you on right track. Attempt the quiz given below on Science and Technology and write your answers in comments section to evaluate on next day.

[Questions]

Q.1) Surface of the copper vessels and utensils turns black with time. It is the result of
a) Reaction of copper with the Nitrogen
b) Reaction of moisture with the copper
c) Oxidation of the copper to copper oxide
d) Due to presence of carbon dioxide in the air

Q.2) Consider the following statements:
1. Gain of electrons by atoms, molecules or ions is also known as Reduction.
2. Gain of Hydrogen by molecules or chemical substances is also known as Reduction.

Which of the above statements is/are correct?
a)1 Only
b)2 Only
c)Both 1 and 2
d)Neither 1 nor 2

Q.3) Consider the following statements:
1.Hydrogen gas is flammable and combustible gas.
2.Oxygen is non flammable, combustible gas.

Select the correct statement using the codes given below.
a)1 Only
b)2 Only
c)Both 1 and 2
d)Neither 1 nor 2

Q.4) Consider the following statements:
1.Nettle is a herbaceous plant whose leaves secrete Methanoic acid.
2.Formic acid is found in the stings of ants and bees.

Select the correct statement using the codes given below.
a)1 Only
b)2 Only
c)Both 1 and 2
d)Neither 1 nor 2

Q.5) Which of the following are uses of Bleaching powder?
1. Used in the textile industry
2. as an oxidising agent
3. for disinfecting drinking water.

Select the correct answer using the codes given below.
a) 1 and 3 only
b) 3 only
c) 2 and 3 only
d) 1, 2 and 3

Q.6) Consider the following statements:
1. Gravity does not have role in the deciding direction that plant grows in.
2. Growth of pollen tubes towards ovules is result of geotropism.

Select the incorrect statement using the codes given below.
a)1 Only
b)2 Only
c)Both 1 and 2
d)Neither 1 nor 2

Q.7) Fly Ash is used in
1. Mine reclamation
2. Concrete production
3. Cosmetics
4. Toothpaste
5. Stabalisation of soft soil
6. Application on rivers to melt ice

Select the correct answer using the codes given below.
a) 1, 2, 3 and 5
b) 3, 4, 5 and 6
c) 1, 2, 3, 5 and 6
d) 1, 2, 3, 4, 5 and 6

Q.8) As per latest theory on cosmos, Consider the following.
1.Dark energy
2.Dark matter
3.Matter which we can see

Arrange them in decreasing order  as fraction of universe is:
a)1 > 2 > 3
b)2 > 1 > 3
c) 2 > 3 > 1
d) 3 > 2 > 1

Q.9)Consider the following statements:
1.Protons are fundamental particles
2.Gravitational forces does not apply to elementary particles.

Select the incorrect statement using the codes given below.
a) 1 Only
b) 2 Only
c) Both 1 and 2
d) Neither 1 nor 2