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Nick suffers from a disease called lactose intolerance. He cannot digest milk, and suffers from severe diarrhoea when he consumes the same. Since milk is a good source of calcium, he has to consume other food items containing calcium, so that the calcium deficiency caused by lack of milk intake is covered. Which of the following food items is a rich source of calcium?

Among the given alternatives, spinach is a rich calcium source and can be consumed by people suffering from lactose intolerance.... View Article

In colloidal system, which particles has the size of 1nm – 1000nm?

The dispersion medium is the substance in which the colloidal particles are distributed in the particle range of 1nm to 1000nm.... View Article

What will be the momentum of a body, if the force acting on the body is zero?

Force, F = dp /dt ( rate of change of momentum).Therefore, only when the momentum is constant, will the acting force be Zero.... View Article

Name a device that helps to maintain a potential difference across a conductor.

Potential difference can be defined as the difference in energy that charge carriers have between two points in a circuit. The... View Article

What is the conclusion for an object moving with a uniform velocity?

There is no unbalanced force. There might be a number of forces acting on the body but these forces are adding up to zero.... View Article

Among the following compounds the one that is paramagnetic is: a. O22- b. O3 c. N2O d. O2-

In O22-, O3 and N2O no unpaired electron is present. But O2- has one unpaired electron and shows paramagnetic behaviour.... View Article

What is a Finkelstein reaction?

In the Finkelstein reaction, alkyl iodides are prepared by the reaction of alkyl chlorides/bromides with NaI in dry acetone. The Finkelstein... View Article

Nitric acid does not react with which of the following metals? a. Chromium b. Magnesium c. Maganese d. Zinc

Chromium do not dissolve in concentrated nitric acid because of the formation of a passive film of oxide on the surface.... View Article

Amongst the following molecules, the one with the highest bond multiplicity is: a. Ethene b. Ethyne c. Ethane

Ethane has single bond, ethene has double bond, ethyne has triple bond. Hence ethyne has highest bond multiplicity.... View Article

Oxygen is transported from alveoli to tissues in the form of

Oxygen is transported from alveoli to tissues in the form of oxy haemoglobin that is an association of O2 with Hb.... View Article

Oxidation reactions involve loss of dihydrogen so they are also known as:

Oxidation reactions are also known as dehydrogenation reactions as they involve loss of dihydrogen from alcohol.... View Article

A homopolymer has only one type of building block called a monomer repeated ‘n’ number of times. A heteropolymer has more than one type of monomer. Proteins are heteropolymers made of amino acids. While a nucleic acid like DNA or RNA is made of only 4 types of nucleotide monomers, proteins are made of

Proteins are building blocks of life. Each protein is made of a long chain of amino acids. Amino acids are made up of an amino-functional group... View Article

Atmosphere traps the sun’s heat near the earth’s surface. This is called:

When atmosphere traps the sun energy near the earth surface then it is known as Natural green house effect.... View Article

Be and Mg do not react with water. This is because of:

Be and Mg are kinetically inert to water due to formation of protective oxide film on the surface of it.... View Article

Is it true that two bodies exert force on each other only when they are in contact?

It is not always necessary that two bodies can exert force on one another only when they are in contact.... View Article

The electronegativity of following elements increases in the order of?

In general, electronegativity increases across a period from left to right and decreases down the group. Si<P<C<N is the correct order... View Article

What will be the flow of water if a cell is placed in a hypotonic solution?

Since in hypotonic solution osmotic pressure is less water will flow into the cell and cell will swell.... View Article

Which of the following is not a function of muscles? (a) Bones delicate the internal organs of the body (b) Bones provide a framework for the attachment of muscles and other tissues (c) Bones serve as a reservoir for calcium and phosphorus. (e) Bones enable body movements

Option(a) Bones delicate the internal organs of the body Protect the delicate internal organs of the body. The bones protect the delicate... View Article

A quantity has a value of -16 m/s2. What does this quantity indicate?

Metre per second square is a unit of acceleration and negative acceleration is known as retardation.... View Article

Name the instrument that is used for listening sounds produced within the body.

Instrument used for listening sounds produced within the body is called Stethoscope used by doctors.... View Article

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