Which of the following statements is not true about Bt cotton ?

• Bt cotton has increased profit margin of farmers
• Use of insecticides has reduced significantly
• Seeds of Bt cotton are cheaper than non-GM seeds
• Since the use of Bt cotton India's cotton export has doubled.
Correct Option: C  [ Seeds of Bt cotton are cheaper than non-GM seeds ]

Remark:

A radar which detect the presence of an aircraft in sky uses :

• Sound waves
• Radio waves
• Ultrasonic waves
• Infrared rays
Correct Option: B  [ Radio waves ]

Remark:

What happens to a person who receives the wrong type of blood?

• all the arteries constrict
• all the arteries dialate
• the RBCs agglutinate
• the spleen and lymph nodes deteriorate
Correct Option: C  [ the RBCs agglutinate ]

Remark:

Which metal is responsible for Itai-Itai disease?

• Cadmium
• Nickel
• Chromium
• Mercury
Correct Option: A  [ Cadmium ]

Remark:

Which among the following is respiratory pigment in human beings?

• Melanin
• Haemoglobin
• Rhodopsin
• Bilirubin
Correct Option: B  [ Haemoglobin ]

Remark:

Hydro?uoric acid is not kept in glass bottles because it reacts with:

• visible light
• sodium oxide of glass
• aluminium oxide of glass
• silicon dioxide of glass
Correct Option: D  [ silicon dioxide of glass ]

Remark:

Minamata disease in Japan was caused due to pollution of water by :

• Lead
• Mercury
• Cyanide
• Arsenic
Correct Option: B  [ Mercury ]

Remark:

What does the airbag, used for safety of car driver, contain?

• Sodium bicarbonate
• Sodium azide
• Sodium nitrite
• Sodium peroxide
Correct Option: B  [ Sodium azide ]

Remark:

Which of the following is NOT an allotrope of carbon?

• Diamond
• Graphite
• C-60
• Methane
Correct Option: D  [ Methane ]

Remark:

Who invented vaccination for 'small pox'?

• Sir Fredrick Grant Banting
• Sir Alexander Fleming
• Edward Jenner
• Louis Pasteur
Correct Option: C  [ Edward Jenner ]

Remark: