Question 1

Chemical formula for water is

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NaA1O2
H2O
Al2O3
CaSiO3

Answer

Correct Option: B

Question 2

The gas usually filled in the electric bulb is

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nitrogen
hydrogen
carbon dioxide
oxygen

Answer

Correct Option: A

Question 3

Washing soda is the common name for

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Sodium carbonate
Calcium bicarbonate
Sodium bicarbonate
Calcium carbonate

Answer

Correct Option: A

Question 4

Quartz crystals normally used in quartz clocks etc. is chemically

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silicon dioxide
germanium oxide
a mixture of germanium oxide and silicon dioxide
sodium silicate

Answer

Correct Option: A

Question 5

Which of the gas is not known as green house gas?

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Methane
Nitrous oxide
Carbon dioxide
Hydrogen

Answer

Correct Option: D

Question 6

Bromine is a

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black solid
red liquid
colourless gas
highly inflammable gas

Answer

Correct Option: B

Question 7

The hardest substance available on earth is

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Gold
Coal
Diamond
Platinum

Answer

Correct Option: C

Question 8

The variety of coal in which the deposit contains recognisable traces of the original plant material is

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bitumen
anthracite
lignite
peat

Answer

Correct Option: D

Question 9

Tetraethyl lead is used as

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pain killer
fire extinguisher
mosquito repellent
petrol additive

Answer

Correct Option: D

Question 10

Which of the following is used as a lubricant?

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Graphite
Silica
Iron Oxide
Diamond

Answer

Correct Option: A

Question 11

The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is

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Argon
Xenon
Helium
Krypton

Answer

Correct Option: C

Question 12

The gases used in different types of welding would include

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oxygen and hydrogen
oxygen, hydrogen, acetylene and nitrogen
oxygen, acetylene and argon
oxygen and acetylene

Answer

Correct Option: D

Question 13

The property of a substance to absorb moisture from the air on exposure is called

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osmosis
deliquescence
efflorescence
desiccation

Answer

Correct Option: B

Question 14

In which of the following activities silicon carbide is used?

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Making cement and glass
Disinfecting water of ponds
cutting very hard substances
Making casts for statues

Answer

Correct Option: C

Question 15

The average salinity of sea water is

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3%
3.5%
2.5%
2%

Answer

Correct Option: B

Question 16

When an iron nail gets rusted, iron oxide is formed

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without any change in the weight of the nail
with decrease in the weight of the nail
with increase in the weight of the nail
without any change in colour or weight of the nail

Answer

Correct Option: C

Question 17

What OS does the Nokia 3500 have?

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Symbian
android
java
IOS

Answer

Correct Option: C

Question 18

What OS does Nokia N72 have?

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Symbian v2
Symbian v5
Symbian v3
java enabled

Answer

Correct Option: A

Question 19

MOTOROKR E6 runs on Linux?

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True
False

Answer

Correct Option: A

Question 20

OS of Nokia 5800 xm?

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Symbian v1
symbian v2
symbian v3
none of the above

Answer

Correct Option: D

Description: science & technology Online Quiz - 13
Number of Questions: 20
Created by: Aliensbrain Bot
Tags: science & technology

science & technology Online Quiz - 13

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