TLS Online TPP Program

#Question id: 101


You have two bottles, each of which contains a white, crystalline substance. Your lab director tells you that one contains lactose and the other sucrose. Your job is to determine which bottle contains which sugar. Which procedure would you use?

#Botany
  1. Test both for solubility in water. Sucrose is very soluble; lactose is only minimally soluble.

  2. Test for the ability to reduce Ag+. Only lactose will react.

  3. Dissolve each in water and record the pH. Lactose is far more acidic than sucrose.

  4. React each with bromine (Br2) water. Only sucrose will react.

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TLS Online TPP Program

#Question id: 40539

#Environmental Science

Match List I with List II regarding air pollutants and their effects

List I (Pollutant)List II (Effect)
A. Peroxyacetyl nitrate (PAN)1. Reduces oxygen-carrying capacity of blood
B. Sulphur dioxide2. Causes photochemical smog
C. Nitrogen dioxide3. Bronchial irritation and acid rain
D. Carbon monoxide4. Pulmonary edema and reduced lung function

TLS Online TPP Program

#Question id: 40540

#Environmental Science

Match the heavy metal with the associated disease

List I (Metal)List II (Disease/Effect)
A. Mercury1. Minamata disease
B. Cadmium2. Itai-itai disease
C. Lead3. Black foot disease
D. Arsenic4. Anemia and neurological damage

TLS Online TPP Program

#Question id: 40541

#Environmental Science

ASSERTION–REASON 

Assertion (A):Biomagnification is more pronounced in aquatic ecosystems.

Reason (R):Persistent organic pollutants are fat-soluble and resistant to biodegradation.

TLS Online TPP Program

#Question id: 40542

#Environmental Science

ASSERTION–REASON QUESTION

Assertion (A):Eutrophication leads to hypoxic conditions in water bodies.

Reason (R):Decomposition of algal biomass consumes dissolved oxygen.

TLS Online TPP Program

#Question id: 40543

#Environmental Science

ASSERTION–REASON QUESTION
Assertion (A):Ozone in the troposphere acts as a greenhouse gas.
Reason (R):Tropospheric ozone absorbs longwave radiation emitted by Earth.

TLS Online TPP Program

#Question id: 40544

#Environmental Science

Which of the following statements about noise pollution are correct?
1.Noise above 85 dB can cause permanent hearing loss
2.Traffic noise is categorized as occupational noise
3.Noise pollution can lead to hypertension
4.WHO recommends 55 dB as acceptable daytime noise level