Tag: chemistry

Questions Related to chemistry

An atom of element has $2K, 8L$ and $3M$ electrons. Then the element belongs to :

chemistry d- and f-block elements actinoids the actinoids the d-and f-block elements comparison of lanthanoids and actinoids

  1. IA group

  2. IIA group

  3. IIIA group

  4. IVA group

Show answer
Correct Option: C
Explanation:

The total number of electrons present in all the shells are $2+8+3=13$, hence the atomic number of element is $13$ and the electronic configuration would be $1s^22s^22p^63s^23p^1 $. Element belongs to $|||A$ group.

Most of the man-made synthetic elements occur:

chemistry d- and f-block elements actinoids the actinoids the d-and f-block elements comparison of lanthanoids and actinoids

  1. in actinide series

  2. in lanthanide series

  3. in coinage metals

  4. in alkaline earth metals

Show answer
Correct Option: A

Maximum oxidation state of uranium and plutonium are respectively:

chemistry d- and f-block elements actinoids the actinoids the d-and f-block elements comparison of lanthanoids and actinoids

  1. $4$ and $6$

  2. $5$ and $6$

  3. $6$ and $7$

  4. $6$ and $8$

Show answer
Correct Option: C
Explanation:
Solution:- (C) $6$ and $7$
Uranium has maximum oxidation number $= +6$ 
Plutonium has maximum oxidation number $= +7$

India's first atomic power station is

chemistry energy production hazards and safety measures of radiations harmful effects and safety precautions for radiations nuclear physics

  1. BARC

  2. Tarapur atomic power station

  3. Narora atomic power station

  4. none of these

Show answer
Correct Option: B
Explanation:

Tarapur Atomic Power Station (T.A.P.S) was the first nuclear power plant in India. The construction of the plant was started in 1962 and the plant went operation in 1969. It is the world's oldest nuclear power plant in commercial operation. It was build for the departments of Atomic Energy by General Electric and Bechtel.

In India, uranium is found in

chemistry energy production hazards and safety measures of radiations harmful effects and safety precautions for radiations nuclear physics

  1. U.P.

  2. M.P.

  3. Bihar

  4. Orissa

Show answer
Correct Option: C
Explanation:

Bihar 

 The earliest reference to a uranium mineral in India appeared in a German publication in 1860 in which Emil Stoehr recorded its occurrence at Lapso hill Singhbhum District, Bihar. The most important minerals of uranium has been located around Jadugora, Singbhum District of BIhar.






What percentage of energy requirement of India is met by nuclear power stations?

chemistry energy production hazards and safety measures of radiations harmful effects and safety precautions for radiations nuclear physics

  1. 3%

  2. 5%

  3. 10%

  4. 20%

Show answer
Correct Option: A
Explanation:

3%

Nuclear reactor provide 3 per cent of the total electricity generation. Despite its rather meagre contribution, nuclear energy holds sustantive promise from the perspective of meeting India's humbingous energy needs in a secure, sustainable low carbon way.

Which statement describe general waste?

chemistry energy production hazards and safety measures of radiations harmful effects and safety precautions for radiations nuclear physics

  1. Much of the general waste at St. Paul's Hospital includes common items found in household garbage.

  2. Much of the general waste at St. Paul's Hospital is different and must be treated in special ways

  3. Much of the general waste at St. Paul's Hospital is not the same as other garbage and is dangerous if not disposed of properly

  4. None of the above

Show answer
Correct Option: A
Explanation:

Much of the general waste at At. Paul hospital includes common items found in household garbage. 

General waste also called residual waste is material from business and household that can be recycled. 

Which of the following element(s) is not essential for life to originate and flourish on a planet?

chemistry energy production hazards and safety measures of radiations harmful effects and safety precautions for radiations nuclear physics

  1. carbon

  2. hydrogen and oxygen

  3. nitrogen

  4. uranium

Show answer
Correct Option: D
Explanation:
Uranium is the element which is not essential for life to originate and flourish on a planet.

An atom bomb is based on the principle of

chemistry energy production hazards and safety measures of radiations harmful effects and safety precautions for radiations nuclear physics

  1. nuclear bomb

  2. nuclear fusion

  3. the liquid drop model

  4. none of these

Show answer
Correct Option: A
Explanation:

A

Atom bomb is based on the principles of nuclear bomb. When the nuclear bomb detonated gamma rays and X-rays emitted it to thermonuclear temperatures. The ensuing fission reaction creates enormous numbers of high speed neutrons, which can then induce fission in materials not normally prone to it, such as depleted uranium. 

Which of the following is correct during drought?

(1) The soil conserves water by avoiding evaporation and transpiration
(2) The soil remains wet.
(3) The ground water may not become scarce.
(4) The level of water in ponds and wells of the region goes down and some of them may even dry up.
(5) In drought conditions, it is not difficult to get food and fodder.

chemistry water in our life how can we conserve water? droughts, floods and water conservation conservation of water and its importance and methods

  1. (1) and (2)

  2. (1) and (3)

  3. (4) only

  4. all of the above

Show answer
Correct Option: C
Explanation:

During drought, the following is correct.

(1) The soil continues to lose water by evaporation and transpiration
(2) The soil becomes dry.
(3) The ground water may also become scarce.
(4) The level of water in ponds and wells of the region goes down and some of them may even dry up.
(5) In drought conditions, it is difficult to get food and fodder.