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Byju's Answer

Standard VIII

History

Weavers in India

Fill in the b...

Question

Fill in the blanks:-
Cotton bolls gives (a)_____ gives (b) gives (c)_ gives (d)________ gives Cotton fabrics.

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Solution

Cotton bolls gives (a)_ raw cotton gives (b)_deseeded cotton_ gives (c)_sliver_ gives (d)yarn_gives Cotton fabrics

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Similar questions

Q. Which of the following is incorrect ?

a. A convex mirror can give a virtual image.

b. A convex mirror cannot give a real image.

c. A concave mirror can give a virtual image.

d. A concave mirror can give a diminished virtual image.

Q. An inorganic halide

(A)

gives the following reations:
(i) the cation of

(A)

on reaction with

H_{2} S

H C l

medium, gives a black ppt. of

(B)

(A)

neither gives ppt. with

H C l

nor blue colour with

K_{4} F e (C N)_{6}

.
(ii)

(B)

on heating with dil.

H C l

gives back compound

(A)

and a gas

(C)

which gives a black ppt. With lead acetate solution.
(iii) the anion of

(A)

gives chromyl chloride test.
(iv)

(B)

dissolves in hot dil.

H N O_{3}

to give a solution,

(D)

(D)

gives ring test.
(v) when

N H_{4} O H

solution is added to

(D)

, a white precipitate

(E)

is formed.

(E)

dissolves in minimum amount of dil.

H C l

to give a solution of

(A)

. Aqueous solution of

(A)

on addition of water gives a whitish turbidity

(F)

.
(vi) aqueous solution of

(A)

on warming with alkaline sodium stannite gives a black precipitate of a metal

(G)

and sodium stannate. The metal

(G)

dissolves in hydrochloride acid to give solution of

A

Identify

(F)

and

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and give balanced chemical equations of reactions.

Q. Give a brief account of Bt-cotton.

Q. Give a brief account of Bt cotton.

A metal gives two chlorides ‘A’ and ‘B’. ‘A’ gives black precipitate with $N H_{4} O H$ and ‘B’ gives white precipitate .With KI ,‘B’ gives a red precipitate soluble in excess of KI. ‘A’ and ‘B’ are respectively :

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Fill in the blanks:- Cotton bolls gives (a)___________ gives (b)____________ gives (c)_____________ gives (d)______________ gives Cotton fabrics.

Cotton bolls gives (a)_ raw cotton__ gives (b)___deseeded cotton___ gives (c)___sliver_____ gives (d)__yarn___gives Cotton fabrics

Fill in the blanks:-
Cotton bolls gives (a)_____ gives (b) gives (c)_ gives (d)________ gives Cotton fabrics.

Cotton bolls gives (a)_ raw cotton gives (b)_deseeded cotton_ gives (c)_sliver_ gives (d)yarn_gives Cotton fabrics