List of practice Questions

Grignard reagent should be prepared under anhydrous conditions. Give reasons.
In a given graph of zero order reaction, the slope and intercept are:

zero order reaction
Nucleophilic addition of Grignard reagent to ketones followed by hydrolysis with dilute acids forms:
Identify the tertiary amine from the following:
The correct Mathematical expression of Arrhenius equation is:
From the elements of 3d series below, which element shows the maximum number of oxidation states?
Which alkyl halide from the given options will undergo S$_N$1 reaction faster?
Rosenmund reduction is used for the preparation of Aldehydes. The catalyst used in this reaction is:
Which of the following acids represents Vitamin C?
Consider the following reaction:
Identify A and B
Identify A and B from the given options:
Explain in brief the function of an electric fuse in a domestic circuit. An electric heater of current rating 3 kW; 220 V is to be operated in an electric circuit of rating 5 A. What is likely to happen when the heater is switched ‘ON’? Justify your answer with necessary calculation.
Name and explain the phenomenon of light due to which the path of a beam of light becomes visible when it enters a smoke filled room through a small hole. Also state the dependence of colour of the light we receive on the size of the particle of the medium through which the beam of light passes.
Write two limitations of the use of electrical impulses.
List two constituents of Central Nervous System (CNS). How are these components protected from injuries?
We water the soil but it reaches the topmost leaves of the plants. Explain in brief the process involved.
State giving reason for the change in appearance observed when each of the following metal is exposed to atmospheric air for some time:
(i) Silver,
(ii) Copper and
(iii) Iron
State giving reason the reduction process to obtain the following metals from their compounds:
(i) Mercury,
(ii) Copper and
(iii) Sodium
State reasons for the following:
(a) Zinc oxide is an amphoteric oxide.
(b) Sodium metal is stored in bottle filled with kerosene oil.
(c) In the reactions of nitric acid with metals, generally hydrogen gas is not evolved.
What are decomposers? List two consequences of their absence in an ecosystem.
Name the device used to magnetise a piece of magnetic material. Draw a labelled diagram to show the arrangement used for the magnetisation of a cylinder made of soft iron.
Draw a labelled diagram to show the pattern of magnetic field lines produced due to a current carrying straight conductor. Mark on it the direction of current in the conductor and the direction of magnetic field lines.
When do we say that a particular person is suffering from hypermetropia? List two causes of this defect. Name the type of lens used to correct this defect.
In human beings, the probability of getting a male or a female child is 50%. Explain with the help of a flow diagram only.
List any two pairs of visible contrasting characters of garden pea plants used by Mendel for his experiments stating the dominant and recessive characters in each pair.
Where are auxins synthesized? How do they promote phototropism?