Question

જો
$\alpha$
અને
$\beta$
એ બહુપદી
$p(x) = 3x {}^{2} + 11x + a$
નાં શૂન્યો હોય તો
$3 \alpha \: and \: 3 \ \beta$
શૂન્યો ધરાવતી બહૂપદી શોધો​

Answer 1

Step-by-step explanation:

Open Textbook Test in Science (OTS) 05/2020-21

Time : 1 ½ hr ( + 15 minutes grace time) MM: 40

Instructions:

(a) All questions are compulsory

(b) Q.1 to Q.8 carry 1 mark each

(c) Q.9 to Q. 16 carry 2 marks each

(d) Q. 17 and Q. 18 carry 3 marks each

(e) Q. 19 and Q.20 carry 5 marks each

Section -I

Q.1. The colour of the precipitate formed when barium chloride solution is mixed

with sodium sulphate solution is

(a) blue

(b) black

(c) white

(d) green

Q.2. On adding dilute hydrochloric acid to copper oxide, the solution formed is blue-

green. Predict the new compound formed which imparts a blue-green colour to the

solution.

Q. 3. What happens when quick lime is added to water? Write the balanced chemical

equation.

Q.4. Write a balanced chemical equation:

FeSO4(s) → Fe2O3 (s) + SO2 (g) + SO3 (g)

Q.5. A student detected the pH of four unknown solution A, B, C and D as follows 11,

5, 7 and 2. Predict the nature of the solution.

Q.6. Give the constituents of baking powder.

Q.7. How will you test for the gas which is liberated when hydrochloric acid reacts

with an active metal?

Q.8. Explain how antacid works.