as-tu vu quelqu'un dans ma chambre? Avez vous visite les pyramides? Y a-t-il encore du cafe dans la cafetiere? Est-ce que tout est interessant dans cette boutique? est-elle deja rentree de l'ecole? Pourrez vous oubler ce bel endroit? Quelqu'un est alle au rendrez vous? Quelque chose vous plait? FAITES UNE RESPONSE NEGATIVE CLASS 9

Explanation:

in this question we draw a right triangle and consider any acute angle as thitha. now sin is perpendicular / Hypotenuse so put the values in triangle. then we apply Pythagoras theorem and find third side of triangle.

after that find the values of sec and cot and solve by adding them.

Answer:

your language is both understand

Answer:

The process of converting water into water vapour is called evaporation.

Explanation:

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Answer:

The process of converting water into water vapour is called evaporation.

Answer:

(a) 2HNO

3

+Ca(OH)

2

→Ca(NO

3

)

2

+2H

2

O

∙ It is a double displacement reaction since both molecules of the reactions are displaced to form new products.

∙ Nitric acid (HNO

3

) combines with calcium hydroxide [Ca(OH)

2

] to produce calcium nitrate[Ca(NO

3

)

2

]-a salt and water, which is a neutralization reaction.

∙ Hence, this reaction is both a double displacement as well as a neutralization reaction.

(b) 2NaOH+H

2

SO

4

→Na

2

SO

4

+2H

2

O

∙ It is a double displacement reaction since both molecules of the reactions are displaced to form new products.

∙ Sulphuric acid (H

2

SO

4

) combines with sodium hydroxide (NaOH) to produce sodium sulphate(Na

2

SO

4

)-a salt and water, which is a neutralization reaction.

∙ Hence, this reaction is both a displacement as well as a neutralization reaction.

(c) NaCl+AgNO

3

→AgCl+NaNO

3

∙ This is a double displacement reaction since there is an exchange of ions between the reactants, forming new products.

(d) BaCl

2

+H

2

SO

4

→BaSO

4

+2HCl

∙ This is a double displacement reaction since there is an exchange of ions between the reactants, forming new products.

Explanation:

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