Producer gas is obtained by

The density of a gas 'X' is twice that of another gas 'Y'. If the molecular weight of gas 'Y' is 'M'; then the molecular weight of the gas 'X' will be

A

2M

B

$$\frac{{\text{M}}}{2}$$

C

M

D

$$\frac{{\text{M}}}{4}$$

দুটি এক-পরমাণুক আদর্শ গ্যাস পরস্পরের সাথে তাপীয় সাম্যাবস্থায় আছে। A গ্যাস m ভরের অণু দ্বারা গঠিত, এবং B গ্যাস 4m ভরের অণু দ্বারা গঠিত। A গ্যাসের আয়তন ৪ গ্যাসের আয়তনের দ্বিগুণ। এদের চাপের অনুপাত PA / PB কত? (Two monoatomic ideal gases are in thermal equilibrium with each other. Gas A is composed of molecules with mass m while gas B is composed of molecules with mass 4m. The volume of gas A is twice that of gas B. What it the ratio of their pressures PA / PB ?)

A

1/4

B

1/2

C

1

D

2

The average mark obtained by 15 students was 10 and the average mark obtained by 10 students was 15. What was the average mark obtained by all students?

A

10

B

8

C

12

D

15

The average mark obtained by 10 students was 6 and the average mark obtained by 6 other students was 10. What was the average mark obtained by all 16 students?

A

10

B

8

C

7.5

D

8.5

The average mark obtained by 10 students was 6 and the average mark obtained by 6 students was 10. What is the average mark obtained by all 16 students ?

A

10

B

8

C

7.5

D

8.5

The total number obtained by a student in Physics, Chemistry and Mathematics together is 120 more than the marks obtained by him in Chemistry. What is the average mark obtained by him in Physics and Mathematics together?

A

40

B

60

C

120

D

Cannot be determined

which country is the largest producer of natural gas?

A

Saudi Arabia

B

Iran

C

Russia

D

Qatar

Producer gas is produced by

A

Carbonisation of coal

B

Passing steam over incandescent coke

C

Passing air and a large amount of steam over waste coal at about 65°C

D

Partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast

Steam is intermittently admitted into the fuel bed during the production of producer gas to

A

Convert CO to CO₂

B

Increase the combustion rate

C

Increase the gas production rate

D

Minimise the chances of clinker formation

Producer gas consists mainly of

A

CO, CO₂, N₂, H₂

B

CO, H₂

C

H₂, CH₄

D

C₂H₂, CO₂, H₂

Producer gas is obtained by

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