NTA JEE Main 24th June 2022 Shift 2
For the following questions answer them individually
NTA JEE Main 24th June 2022 Shift 2 - Question 31
$$120$$ g of an organic compound which contains only carbon and hydrogen on complete combustion gives $$330$$ g of $$CO_2$$ and $$270$$ g of water. The percentage of carbon and hydrogen in the organic compound are respectively
NTA JEE Main 24th June 2022 Shift 2 - Question 32
The energy of one mole of photons of radiation of wavelength $$300$$ nm is (Given :
$$h = 6.63 \times 10^{-34}$$ J s, $$N_A = 6.02 \times 10^{23}$$ mol$$^{-1}$$, $$c = 3 \times 10^{8}$$ m s$$^{-1}$$)
NTA JEE Main 24th June 2022 Shift 2 - Question 33
Metals generally melt at very high temperatures, Among the following which one has the highest melting point?
NTA JEE Main 24th June 2022 Shift 2 - Question 34
The correct order of bond orders of $$C_2^{2-}$$, $$N_2^{2-}$$ and $$O_2^{2-}$$ is
NTA JEE Main 24th June 2022 Shift 2 - Question 35
At $$25°$$C and 1 atm pressure, the enthalpies of combustion are as given below:
| Substance | $$H_2$$ | C (graphite) | $$C_2H_6(g)$$ |
|---|---|---|---|
| $$\frac{\Delta_c H^\ominus}{kJ mol^{-1}}$$ | $$-286.0$$ | $$-394.0$$ | $$-1560.0$$ |
The enthalpy of formation of ethane is
NTA JEE Main 24th June 2022 Shift 2 - Question 36
Which one of the following compounds is used as a chemical in certain type of fire extinguishers
NTA JEE Main 24th June 2022 Shift 2 - Question 37
Arrange the following carbocations in decreasing order of stability.
NTA JEE Main 24th June 2022 Shift 2 - Question 38
Given below are two statements.
Statement I: The presence of weaker $$\pi$$-bonds make alkenes less stable than alkanes
Statement II: The strength of the double bond is greater than that of carbon-carbon single bond.
In the light of the above statements, choose the correct answer from the options given below.
NTA JEE Main 24th June 2022 Shift 2 - Question 39
Which of the following reagents / reactions will convert 'A' to 'B'?
NTA JEE Main 24th June 2022 Shift 2 - Question 40
Some gases are responsible for heating of atmosphere (green house effect). Identify from the following the gaseous species which does not cause it.
