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Chemistry 79

Chemistry 79

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Quiz Questions And Answers

"Acid rain" is caused due to air-pollution by

Nitrous oxide and sulphur dioxide
Methane
Carbon dioxide
Carbon monoxide

In the Ostwald's process for manufacture of HNO3 used is

Fe
Na
Pt
Mo

Stainless steel is an alloy of

Iron, carbon and nickel
Iron, chromium and nickel
Iron and manganese
Iron, chromium and zinc

The elements with the highest electronegative character is

Transition elements
Halogens
Alkaline earth metals
Alkali metals

Melting point of graphite is

1500°C
2400°C
2600°C
3700°C

The pH of lemon juice is

1.0 - 3.0
2.2 - 2.4
6.5 - 7.5
4.5-5.5

Which gas is used in filling electric bulbs?

Argon
Neon
Krypton
Radon

The fluoride ore of aluminium is

Cryolite
Bauxite
Haematite
Corundum

The sulphur exists as

S4
S₂
S8
S

What is the ratio of cement and sand required in mortar?

1:3
2:3
3:1
3:2
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