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Hitler's Policies

Umbra is a re...

Question

Umbra is a region of
(i) complete darkness
(ii) partial darkness
(iii) complete brightness
(iv) partial brightness

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Solution

Umbra is the portion of shadow where no light reaches from the source of light due to the opaque object. It is completely dark.

Hence, option (i) is the correct answer.

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Q. Question 20
Mineral acids are stronger acids than carboxylic acids because
(i) Mineral acids are completely ionised
(ii) Carboxylic acids are completely ionised
(iii) Mineral acids are partially ionised
(iv) Carboxylic acids are partially ionised

(a) (i) and (iv)
(b) (ii) and (iii)
(c) (i) and (ii)
(d) (iii) and (iv)

Q. Question 20
Mineral acids are stronger acids than carboxylic acids because
(i) Mineral acids are completely ionised
(ii) Carboxylic acids are completely ionised
(iii) Mineral acids are partially ionised
(iv) Carboxylic acids are partially ionised

(a) (i) and (iv)
(b) (ii) and (iii)
(c) (i) and (ii)
(d) (iii) and (iv)

Q. Mineral acids are stronger acids than carboxylic acids because :
(i) mineral acids are partially ionised
(ii) minerals acids are completely ionised
(iii) carboxylic acids are a partially ionised
(iv) carboxylic acids are completely ionised
Select the correct alternative.

Q. A plant growing in complete darkness shows

Q. Mineral acids are stronger acids than carboxylic acids because :

(i) mineral acids are completely ionized.
(ii) carboxylic acids are completely ionized.
(iii) mineral acids are partially ionized.
(iv) carboxylic acids are partially ionized.

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