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Practice Chemistry | States of Matter on Bissoy — browse topics below and open any question.
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Questions
Which of the following element has the highest melting point?
ক
Co
খ
Zn
গ
Ni
ঘ
Cr
Why is argon gas used along with tungsten wire in an electric bulb?
ক
To increase the life of the bulb
খ
To reduce the consumption of electricity
গ
To make the emitted light colored
ঘ
To reduce the cost of the bulb
Who discovered Oxygen?
ক
Carl Scheele
খ
Hooke
গ
Heisenberg
ঘ
Williams
Which of the following is an amorphous material?
ক
Mica
খ
Silver
গ
Lead
ঘ
Glass
Which of the following gases has the highest calorific value?
ক
Producer gas
খ
Coal gas
গ
Water gas
ঘ
Blast furnace gas
Which of the following is not a noble gas ?
ক
Hydrogen<br>
খ
Helium<br>
গ
Neon<br>
ঘ
Argon
The pH scale measures the hydrogen ion concentration in a solution. What does P mean in this?
ক
Power
খ
Potenz, which means power in German
গ
Potential, which means comfort in German
ঘ
Potency, which means power in German
Which gas is known as 'noble gas'?
ক
Hydrogen
খ
Oxygen
গ
Helium
ঘ
Carbon dioxide
What is sublimation?
ক
It is the process of conversion of a liquid into gas
খ
It is the process of conversion of a solid into liquid
গ
It is the process of conversion of a solid into vapour
ঘ
It is the process of conversion of a gas into liquid
Which of the following oxides is not acidic?
ক
CO
খ
SO<sub>2</sub>
গ
SO<sub>3</sub>
ঘ
NO<sub>2</sub>