Which of the following statements is true/false?1. An alkali that is completely ionized in water produces a large number of OH- ions. For example NaOH, KOH2. An alkali that is partially ionized in water produces a large number of OH+ ions. For example KOH

Which of the following statements is true/false? 1. An alkali that is completely ionized in water produces a large number of OH- ions. For example NaOH, KOH 2. An alkali that is partially ionized in water produces a large number of OH+ ions. For example KOH

Which of the following statements is/are true/false? A. An acid which is completely ionized into ions and produces a large number of H+ ions. For example HCl, H2 SO4, HNO3 B. An acid which is partially ionized in water and produces less number of H+ ions. For example CH3COOH, H2CO3, H2SO2

A

Both A and B are true

B

Only B is true

C

Both A and B are false

D

Only A is true

Which one of the following statements is not true/false?
1. An acid that is completely ionized with ions produces large amounts of H⁺ ions. for example HCl, H2SO₄, HNO₃
2. A weak acid that is partially ionized in water produces small amounts of H⁺ ions. for example - CH₃COOH, H₂CO₃, H₂SO₃

A

Only 2 is correct

B

Both 1 and 2 are correct

C

Both 1 and 2 are incorrect

D

Only 1 is correct

An aqueous solution with NaOH 10 g/L at the rate is 100 L/min and an organic compound with no NaOH at the rate 50 L/min were put into an extraction machine and produced aqueous solution with NaOH 1 g/L, what is the amount of NaOH in organic compound after extraction?

A

2 g/L

B

5 g/L

C

9 g/L

D

15 g/L

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)

Which statement is correct about weak acid? Statement 1: An acid that is completely ionized in water and thus produces a very small amount of hydrogen ions is called a weak acid. Statement 2: Carbonic acid and sulfurous acid are also strong acids.

A

Statement 1 is correct

B

Statement 2 is correct

C

Both are correct

D

None is correct

Which statement is correct about strong acid? Statement 1: An acid that is completely ionized in water and thus produces a very small amount of hydrogen ions is called a strong acid. Statement 2: Sulphuric acid and nitric acid are also strong acids.

A

Statement 1 is correct

B

Statement 2 is correct

C

Both statements are correct

D

None of the above

A water tanker can be filled by 2 pipes A & B separately in 16 min & 32 min respectively. The outlet of the tanker is partially open and it can empty the full tanker completely in 1 hour 4 min. Pipes A & B were opened simultaneously for 9 min to fill the tanker but the partially open outlet was not closed. After 9 min the pipes A & B were closed and the tanker then went to Mohan's house, 6 km away to deliver water. If the tanker moved at a constant speed of 36 km/hr, approximately what percentage of the tanker was full, when it reached Mohan's house?

A

55%

B

63%

C

58%

D

None of the options

ইথাইল আয়োডাইড জলীয় KOH এর সাথে বিক্রিয়ায় উৎপন্ন হয় (Ethyl iodide on reacion with aqueous KOH produces)

A

Ethyne

B

Ethene

C

Ethanol

D

Ethane

Which of the following statements are true? 1) Heat and work are completely interchangeable forms of energy 2) Heat and work are not completely interchangeable forms of energy 3) Work can be converted completely into heat 4) Heat can be converted completely into work

A

1 & 4

B

1 & 3

C

2 & 4

D

2 & 3

1N 100 mL NaOH এর সঙ্গে 2N 150 mL NaOH মিশ্রিত করলে মিশ্রিত NaOH এর শক্তি কত হবে ?

A

1.2 N

B

1.4 N

C

1.5 N

D

1.6 N

Which of the following statements is true/false?
1. An alkali that is completely ionized in water produces a large number of OH^- ions. For example NaOH, KOH
2. An alkali that is partially ionized in water produces a large number of OH⁺ ions. For example KOH

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