The chemical name of 'laughing gas' is

The chemical formula of the laughing gas is

A

NO

B

N₂O

C

NO₂

D

N₂O₃

Which of the following is known as laughing gas?

A

CO2

B

N2O

C

NO2

D

B2O

What is laughing gas?

A

Nitrous Oxide

B

Carbon monoxide

C

Sulphur dioxide

D

Hydrogen peroxide

Which one of the following oxides of Nitrogen is also known as Laughing Gas?

A

NO2

B

N2O5

C

NO

D

N2O

Laughing gas is

A

Nitric oxide

B

Nitrous oxide

C

Nitrogen trioxide

D

Nitrogen pentoxide

The 'laughing gas' is

A

Nitrous oxide

B

Nitric oxide

C

Nitrogen trioxide

D

Nitrogen pentoxide

A special lottery is to be held to select the student who will live in the only deluxe room in a dormitory . There are 100 seniors, 150 juniors and 200 sophomres who applied. Each senior's junior's name , 2 times; and each sophomres who applied. Each senior's name is placed in the lottery 3 times; each junior's name ,2 times name, 2 times ; and each sphomore's name , 1 time . What is the probability that a senior's name will be chosen?

A

18

B

38

C

48

D

28

Which of the following words in not related to laughing?

A

stinking

B

smiling

C

giggle

D

chuckle

"I could not help laughing." here the sentence means ---

A

আমি হাসতে বাধ্য হলাম

B

আমি তাকে হাসাতে বাধ্য হলাম

C

আমি না হাসতে বাধ্য হলাম

D

আমি তাকে না হাসাতে বাধ্য হলাম

Fill in the blank: Rumi went -------- laughing.

A

away

B

to

C

for

D

in

The chemical name of 'laughing gas' is

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