MHT CET 2021 21th September Morning Shift | MHT CET Year Wise Previous Years Questions

MHT CET 2021 21th September Morning Shift

MCQ (Single Correct Answer)

-0

The wavelength of a spectral line of caesium is $$460 \mathrm{~nm}$$. What is the frequency of spectral line?

$$4.5 \times 10^8 \mathrm{~Hz}$$

$$6.5 \times 10^{14} \mathrm{~Hz}$$

$$3 \times 10^9 \mathrm{~Hz}$$

$$5.6 \times 10^{14} \mathrm{~Hz}$$

MHT CET 2021 21th September Morning Shift

MCQ (Single Correct Answer)

-0

Select the catalyst used in hydrogenation of ethene.

Fe - Cr

MnO$$_2$$

Ni (finely divided)

Co - Th alloy

MHT CET 2021 21th September Morning Shift

MCQ (Single Correct Answer)

-0

What is the number of $$-$$CH$$_2$$ - groups present in dodecane?

MHT CET 2021 21th September Morning Shift

MCQ (Single Correct Answer)

-0

Which among the following statements is NOT true?

Compounds of unipositive ions of alkali metals are paramagnetic.

Alkali metals have low density.

All alkali metals are silvery white and soft.

Alkali metals are most electropositive elements.

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