Which among the following is respiratory pigment in human beings?

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

Remark:

The time period of a pendulum when taken to the Moon would:

• remain the same
• decrease
• become zero
• increase
Correct Option: D  [ increase ]

Remark:

What is the other name for Vitamin B₂ ?

• Haemoglobin
• Dextrose
• Thiamine
• Riboflavin
Correct Option: D  [ Riboflavin ]

Remark:

What is the unit for measuring the intensity of sound ?

• Decibel
• Coulomb
• Henry
• Hertz
Correct Option: A  [ Decibel ]

Remark:

Which among the following diseases are not bacterial?

• Cholera and Diphtheria
• Malaria and trichomonasis
• Tetanus and typhoid
• Tuberculosis and leprosy
Correct Option: C  [ Tetanus and typhoid ]

Remark:

Red data book contains data of which of the following?

• All plant species
• All animal species
• All endangered species
• All extinct species
Correct Option: C  [ All endangered species ]

Remark:

The acid present in the stomach of human beings is:

• HNO₃
• H₂CO₃
• HCl
• H₂SO₄
Correct Option: C  [ HCl ]

Remark:

Dialysis is prescribed for patients having:

• Liver disease
• Lung trouble
• Kidney trouble
• Heart Disease
Correct Option: C  [ Kidney trouble ]

Remark:

Which one among the following is strong smelling agent used in LPG cylinder to help in the detection of gas leakage?

• Ethanol
• Thioethanolanine
• Methane
• Chloroform
Correct Option: B  [ Thioethanolanine ]

Remark:

Which one of the following is a chemical change?

• Melting of ice
• Magnetising of Iron
• Burning of coal
• None of these
Correct Option: C  [ Burning of coal ]

Remark: A chemical change, also called a chemical reaction, happens when substances combine or break apart to form entirely new substances with different properties.