Correct Answer: C) 6 months

Explanation

In this question, we are asked about the lifespan of a cheque that is drawn but not presented immediately for payment. The lifespan refers to the period of time during which the cheque can be presented for payment.

The correct option is C, which says that the lifespan of a cheque that is drawn but not presented immediately for payment is 6 months. This means that the person or business who receives the cheque has up to 6 months to deposit or cash it at their bank. After 6 months, the cheque may no longer be valid and the bank may refuse to honor it.

It's important to note that the lifespan of a cheque can vary depending on the country and banking regulations. In some countries, the lifespan may be shorter or longer than 6 months. Therefore, it's always a good idea to check with your bank or consult the relevant banking regulations in your country to know the exact lifespan of a cheque.

To summarize, the lifespan of a cheque that is drawn but not presented immediately for payment is 6 months.

Correct Answer: C. metallic properties are improve in alloys

Correct Answer: C. Direct service

Correct Answer: C. 12

Explanation

If logx 64 = 3, then \(64 = x^3\)

\(4^3 = x^3\)

Since the indices are equal,

x = 4

Hence, x log\(_2\)8

= 4(3.log\(_2\)2)

= where log\(_2\)2 = 1(1)

= 12 X 1

= 12

Correct Answer: C. rhizome

Explanation

Option C is correct as ginger has rhizomes which serve as reproductive structure.

Explanation

(a)(i) Copper is more reactive than silver or copper is higher in the electrochemical series than silver. Hence it will displace silver ions from solution. Copper, being less reactive than lead cannot displace lead, henc it remains insoluble in Pb(NO\(_3\))\(_{2(aq)}\).

(ii) No. of mole of Ag\(^+\) in the solution.

\(\frac{250cm^3 \times 0.2}{1000}\) mole Ag\(^+\) = 0.05mole;

Cu + 2Ag+ 2Ag\(^+\) \(\to\) 2Ag\(^+\) + Cu\(^{2+}\)

63.5g Cu dissolves in 2 mole Ag\(^+\)

1.06g Cu will dissolve in \(\frac{2 \times 1.06}{63.5}\) mol Ag\(^+\) = 0.033

(iii) Amount of (Ag\(^+\)) silver ion present = 0.05. Since this is more than the amount required (0.033) i.e. the AgNO\(_{3(aq)}\) is in excess, all the copper turnings will dissolve

(b)(i) Acids react with electropositive metals to liberate hydrogen

(ii) Acids neutralize bases to form salts.

(iii) Acids react with trioxocarbonate (IV) salts to liberate CO\(_{2(g)}\)

(iv) Acid react with trioxosulphate (IV) salts to liberate SO\(_2\)

(ii) Large scale uses of HNO\(_3\) (1) For manufacturing nitrocompounds such as nitrocellulose which is used for making artificial silk, explosives or compounds for manufacturing dyes. (2) For manufacturing fertilizer. (3) As an oxidizing agent. (4) rocket fuel.

(iii) 2Pb(NO\(_3\))\(_{2(s)}\) \(\to\) 2PbO\(_{(s)}\) + 4NO\(_{2(g)}\) + O\(_{2}\) -

2AgNO\(_{3(s)}\) -> 2Ag\(_{(s)}\) + 2NO\(_{2(g)}\) + O\(_{2(g)}\)

(c)(i) The litmus paper turns pink or red and then white or bleached. (ii) Redox reaction (iii) Bleachinc agent

(d)(i) Coke, coal tar, coal gas and ammoniacal liquor

(ii) uses Coke - a reducing agent or used as fuel.

Coal tar -in manufacture of drugs, dyes, explosives.

Coal gas - as fuel. Ammoniacal liquor -manufacture of fertilizer.

Correct Answer: A. land dispute

Correct Answer: ?D. ?120\(\sqrt{2}\)

Explanation

\(60^2 + x^2 + x^2\)

\(360^2 = 2x^2\)

\(x^2\) = 1800

x = \(\sqrt{1800}\)

x = 42.4264

x = 42.4264

perimeter = 4x

= 4 x 42.4264

= 169.7056

= 120\(\sqrt{2}\)

= 120\(\sqrt{2}\)

Correct Answer: B) mould

Correct Answer: D. shaking off the dust from their feet