Archives

Is lime water an acidic or basic solution?

Lime water has a pH of 12.4. Hence, it is basic in nature.... View Article

Draw the structure of benzene and cyclohexane

Benzene is an organic chemical compound with the molecular formula C6H6. It is a colourless liquid with a sweet odour. The structure of benzene... View Article

Element showing spontaneous combustion is (a). phosphorous (p) b. calcium (ca) c. copper (cu) d. lithium (li)

Option d. lithium (li)... View Article

Which of the following gases protects us from harmful sun (a) Carbon dioxide (b) Nitrogen (c) Ozone (d) Oxygen

Option (c) Ozone.... View Article

The number of atoms in hcp unit cell is a) 4 b) 6 c) 12 d) 12

Option b) 6.... View Article

Drains get blocked by ———————-

Drains get blocked by oils, fats, chemicals and dirts.... View Article

Define calcination and roasting give one example of each

The definition and examples of calcination and roasting is: Calcination: The process in which the ore is heated to a high temperature below its... View Article

Common salt can be purified by a process of?

The common salt is purified by the process of crystallization.... View Article

The rate of first-order reaction is 0.04 mol/l/s at 10 sec and 0.03 mol/L/s at 20 sec after intiation of the reaction. What is the half-life period of the reaction?

The half-life period of the reaction is given as: This is because rate is proportional to [A]... View Article

Which of the following fibre is not a natural fibre?

Which of the following fibre is not a natural fibre? Nylon Jute Silk Cotton The correct option is i. Nylon.... View Article

Is burning of candle a reversible or irreversible change? Is melting of wax a reversible or irreversible change?

The burning of candle is an irreversible change as the burnt candle thread cannot be obtained. While the melting of the wax is a reversible... View Article

Among the following compounds which can be dehydrated very easily a) CH3CH2CH2CH2CH2OH b) CH3CH2CH2CHOHCH3 c) CH3CH2CHCH3CH2CH2OH d) CH3CH2CH3COHCH2CH3

Option d) CH3CH2CH3COHCH2CH3. The ease of dehydration of alcohols is tertiary > secondary > primary according to the order of stability of... View Article

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Archives

Is lime water an acidic or basic solution?

Draw the structure of benzene and cyclohexane

Element showing spontaneous combustion is (a). phosphorous (p) b. calcium (ca) c. copper (cu) d. lithium (li)

Which of the following gases protects us from harmful sun (a) Carbon dioxide (b) Nitrogen (c) Ozone (d) Oxygen

The number of atoms in hcp unit cell is a) 4 b) 6 c) 12 d) 12

Drains get blocked by ———————-

Define calcination and roasting give one example of each

Common salt can be purified by a process of?

The rate of first-order reaction is 0.04 mol/l/s at 10 sec and 0.03 mol/L/s at 20 sec after intiation of the reaction. What is the half-life period of the reaction?

Which of the following fibre is not a natural fibre?

Is burning of candle a reversible or irreversible change? Is melting of wax a reversible or irreversible change?

Among the following compounds which can be dehydrated very easily a) CH3CH2CH2CH2CH2OH b) CH3CH2CH2CHOHCH3 c) CH3CH2CHCH3CH2CH2OH d) CH3CH2CH3COHCH2CH3

What is the IUPAC name of ethylene and acetylene?

Which of the following are amphoteric oxides a) CaO b) NaoH c) BeO d)LiOH

Which of the following is gem-dihalide? (a) CH₃CHBr₂ (b) BrCH₂CH₂Br (c) CH₃CHBrCH₂Br (d) CH₃CHBrCH₂CH₂CH₂Br

Oxidation number of potassium in k2o k2o2 and ko2 respectively is

What happens when ethyl chloride is treated with agno2? Write structure of the product

What are desirable and undesirable changes

What do you mean by seismonastic movement? Name the types of movements in plants

The rate of heart beat is determined by

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