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State true or false: acetylene on ozonolysis gives glyoxal

True. Ethylene reacts with ozone to produce acetylene ozonoid which is furthur hydrolysed in the presence of zinc to form... View Article

Write the main features of arid soil

i) The soil ranges from red to brown in colour. ii) The soil is alkaline in nature as there is... View Article

How will you convert ethene to ethane

Alkenes undergo catalytic hydrogenation and react with hydrogen in the presence of catalyst like nickel, platinum, or palladium to produce... View Article

There are some benches in a class room. If 4 students sit on each bench, then 3 benches are left unoccupied. However, if 3 students sit on each bench, 3 students are left standing. How many students are there in the class? a) 52 b) 36 c) 24 d) 48

Option d) 48 Let there be x students in the class. When 4 students sit on each bench, the number... View Article

The moment of inertia of a door of mass m, length 2l, and width l about its longer side is a) 11ml²/ 24 b) 5ml² / 24 c) ml² / 3 d) None of the above

Option c) ml2 / 3.

Which one of the following statements about water is false a) Water is oxidized to oxygen during photosynthesis b) Water can act both as an acid and as a base c) Ice formed by heavy water sinks in normal water d) There is extensive intramolecular hydrogen bonding in the condensed phase

Option d) There is extensive intramolecular hydrogen bonding in the condensed phase. Water possesses intermolecular hydrogen bonding in the condensed... View Article

When an acid reacts with a metal carbonate or metal hydrogen carbonate, it gives the corresponding salt, gas and product. Name the gas and product? a) Hydrogen and salt b) Carbon dioxide and salt c) Carbon dioxide and water d) Only Carbon dioxide

Option c) Carbon dioxide and water. When an acid reacts with a metal carbonate or metal hydrogen carbonate it produces... View Article

The perimeters of two similar triangles are 30 cm and 20 cm respectively. If one side of the first triangle is 12 cm, determine the corresponding side of the second triangle.

Let △ABC and △DEF be two similar triangles of perimeters P1 and P2 respectively. Also, let AB=12 cm, P1=30 cm,... View Article

Select an appropriate pronoun to fill in the blank: They had a great time. They really enjoyed ________. a) herself b) himself c) themselves d) ourselves

Option c) themselves.

The _________, also called the brains of the computer, is responsible for processing data. a) Memory b) RAM c) Central Processing Unit (CPU) d) None of the above

Option c) Central Processing Unit (CPU). It is the key unit of the computer that is responsible for processing data.

Name the unit which is used to measure the thickness of ozone layer?

A Dobson unit is a measure used in ozone research. One Dobson Unit (DU) is defined to be 0.01 mm... View Article

State true or false: the cell wall is freely permeable

True. The cell wall is freely permeable as it allows the exchange of nutrients and water to exchange between the... View Article

Which of the following is modified to form air cavities in aquatic plants a) Sclerenchyma b) Aerenchyma c) Collenchyma d) None of the above

Option c) Director. Newspaper is prepared by editor and film is directed by director.

How are microwaves produced ? Why is it necessary in microwave ovens to select the frequency of microwaves to match the resonant frequency of water molecules?

Microwaves are generated by vacuum tubes devices that operate on the ballistic motion of electrons controlled by magnetic or electric... View Article

Newspaper:Editor::Film:……? a) Producer b) Actor c) Director d) Make-up artist