Q386. Assertion (A): Unsaturated fats are more reactive compared with the saturated fats. Reason (R): Unsaturated fats have only single bonds in their structure.

Assertion (A): Fatty acids should be a part of the balanced human diet. Reason (R): The cells of the human body cannot synthesize any fatty acids.

Assertion (A): In human body, liver has important role in fat digestion. Reason (R): Liver produces two important fat-digesting enzymes.

Assertion(A): Synthetic detergents can lather well in hard water. Reason (R): Synthetic detergents form soluble calcium and magnesium salts with hard water.

Assertion (A): Amoeba reproduces by fission. Reason (R): All unicellular organisms reproduce by asexual methods.

Assertion (A): All the proteins in our food are digested in small intestine only. Reason (R): The protein-digesting enzyme from pancreas are released into small

Assertion (A): Sodium metal is stored under kerosene. Reason (R): Metallic sodium melts when exposed to air. (a) Both A and R are true and R is the correct expl

Assertion (A): Formic acid is a stronger acid than acetic acid. Reason (R): Formic acid is an organic acid. (a) Both A and R are true and R is the correct expla

Assertion (A): The temperature of a metal wire rises when an electric current is passed through it. Reason (R): Collision of metal atoms with each other release

Assertion (A): The main constituent of the liquefied petroleum gas is methane. Reason (R): Methane can be used directly for burning in homes and factories where

Assertion (A): With the increase of temperature, the viscosity of glycerine increases. Reason (R): Rise of temperature increases kinetic energy of molecules. Co

Assertion (A): Human diet should compulsorily contains glycine, serine and tyrosine. Reason (R): Essential amino acids can not be synthesized in the human body.

Assertion (A): Radio waves bend in a magnetic field. Reason (R): Radio waves are electromagnetic in nature.

Assertion (A): Radio waves bend in a magnetic field. Reason (R): Radio waves are electromagnetic in nature.

Assertion (A): Dolly was the first cloned mammal. Reason (R): Dolly was produced by in vitro fertilization.

Assertion (A): A stick is dipped in water in a slanting position. If observed sideways, the stick appears short and bent at the surface of water. Reason (R): A

Assertion (A): To dilute sulphuric acid, acid is added to water and not water to acid. Reason (R): Specific heat of water is quite large.

Assertion (A): Large cold storage plants use ammonia as refrigerant while domestic refrigerators use chlorofluoro- carbons. Reason (R): Ammonia can be liquefied

Given below: Assertion (A): In the periodic table of chemical elements, electron affinity is always found to increase from top to bottom in a group Reason (R):

Assertion (A): In our houses, the current in the A.C. electricity line changes direction 60 times per second. Reason (R): The frequency of alternating voltage s

Assertion (A): Drinking of whisky increases the frequency of urination. Reason (R): Alcohol intake speeds up the secretion of vasopressin in the body.

Assertion (A): In human beings, the females play a major role in determining the sex of the offspring. Reason (R): Women have two ‘X’ chromosomes. Codes:

Assertion (A): Transformer is useful for stepping up or stepping down voltages. Reason (R): Transformer is a device used in D.C. circuits. In the context of the

Assertion (A): To orbit around the Sun the planet Mars takes lesser time than the time taken by the earth. Reason (R): The diameter of the planet Mars is less t

Assertion (A): The boiling point of water decreases as the altitude increases. Reason (R): The atmospheric pressure increases with altitude. Codes: (a) Both A a

Assertion (A): Cellulose is used in making shatter-proof glass. Reason (R): Polysaccharides are not soluble in water. Codes:

Consumption of fish is considered to be healthy when compared to flesh of other animals because fish contains:

Assertion (A) : In Australia, cattle rearing is done more for meat than for milk. Reason (R) : Australians are traditionally non vegetarians

Assertion (A): Coal-based thermal power stations contribute to acid-rain. Reason (R): Oxides of carbon are emitted when coal burns.

Consider the following: 1. Photosynthesis 2. Respiration 3. Decay of organic matter 4. Volcanic action Which of the above add carbon dioxide to the c

Given below are the names of four energy crops. Which one of them can be cultivated for ethanol?

Some species of plants are insectivorous. Why?

Mon 863 is a variety of maize. It was in the news for the following reason:

Though coffee and tea both are cultivated on hill slopes, there is some difference between them regarding their cultivation. In this context, consider

With reference to soil conservation, consider the following practices: 1. Crop rotation 2. Sand fences 3. Terracing 4. Wind breaks Which of the above

Other than Jatropha curcas, why is Pongamia pinnata also considered a good option for the production of bio- diesel in India? 1. Pongamia pinnata grow

In making the saffron spice, which one of the following parts of the plant is used?