Secondary>Science>>Chemistry>>>JAMB 2018
Ethene and ethane have the same
Ethene and ethane have the same A. chemical properties B. density C. number of carbo…
Showing posts from December, 2025Show all
Secondary>Science>>Chemistry>>>JAMB 1990
If 10.8g of silver is deposited in a silver coulometer connected in series with a copper coulometer, the volue of oxygen liberated is
If 10.8g of silver is deposited in a silver coulometer connected in series with…
Read more
Secondary>Science>>Chemistry>>>JAMB 1990
What volume of 11.0 M hydrochloric acid must be diluted to obtain 1 dm^3 of 0.05M acid?
What volume of 11.0 M hydrochloric acid must be diluted to obtain 1 dm^3 of 0.0…
Read more
Secondary>Science>>Chemistry>>>NECO2015
Calculate the percentage by mass of calcium in calcium trioxocarbonate (IV) [Ca=40, C=12, O=16]
Calculate the percentage by mass of calcium in calcium trioxocarbonate (IV) [C…
Read more
Secondary>Science>>Chemistry>>>NECO2015
Which of the following properties is not characteristic of electrovalent compounds?
Which of the following properties is not characteristic of electrovalent compo…
Read more
Secondary>Science>>Chemistry>>>NECO2015
If a neutral atom loses electron(s) It becomes a
If a neutral atom loses electron(s) It becomes a A. molecules B. negatively cha…
Read more
Secondary>Science>>Chemistry>>>NECO2015
What is the electronic configuration of the element with atomic number 17?
What is the electronic configuration of the element with atomic number 17? A. 1…
Read more
Secondary>Science>>Chemistry>>>NECO2015
The pressure exerted by a gas is a result of
The pressure exerted by a gas is a result of A. bombardment of the walls of th…
Read more
Secondary>Science>>Chemistry>>>JAMB 1990
What is the concentration of H+ ions in moles per dm^3 of a solution of pH 4.398?
What is the concentration of H+ ions in moles per dm^3 of a solution of pH 4.39…
Read more
Secondary>Science>>Chemistry>>>JAMB 1990
2.0g of a monobasic acid was made up to 250 cmᣔ3 with distilled water. 25.00 cmᣔ3 of this solution required 20.00 cmᣔ3 of 0.1 M NaOH solution for complete neutralization. The molar mass of the acid is
2.0g of a monobasic acid was made up to 250 cmᣔ3 with distilled water. 25.00 cm…
Read more
Secondary>Science>>Chemistry>>>JAMB 1990
Na2C2O4+CaCl2 ᐧᐧᐧᐒ CaC2O4 +2NaCl. Given a solution of 1.9g of sodium oxalate in 50g of water at room temperature, calculate the minimum volume of 0.1 M calcium chloride required to produce maximum calcium oxalate using the above equation.
Na2C2O4+CaCl2 ᐧᐧᐧᐒ CaC2O4 +2NaCl. Given a solution of 1.9g of sodium oxalate in…
Read more
Secondary>Science>>Chemistry>>>JAMB 1990
Smoke consists of
Smoke consists of A. solid particles dispersed in liquid B. solid or liquid pa…
Read more
Secondary>Science>>Chemistry>>>JAMB 1990
The solubility in moles per dm3 of 20g of CuSO4 dissolved in 100g of water at 180^0C is
The solubility in moles per dm3 of 20g of CuSO4 dissolved in 100g of water at 1…
Read more
Secondary>Science>>Chemistry>>>JAMB 1990
The effluent of an industrial plant used in the electrolysis of concentrated brine, with a flowing mercury cathode may obtain impurities like
The effluent of an industrial plant used in the electrolysis of concentrated br…
Read more
Secondary>Science>>Chemistry>>>JAMB 1990
A blue solid T, which weigh 5.0g was placed on a table. After 8 hours, the resulting pink solid was found to weight 5.5g. It can be inferred that substance T
A blue solid T, which weigh 5.0g was placed on a table. After 8 hours, the res…
Read more
Secondary>Science>>Chemistry>>>JAMB 1990
10.0dm3 of air containing H2S as an impurity was passed through a solution of Pb(NO3)2 until all the H2S had reacted. The precipitate of PbS was found to weight 5.02g. According to the equation: Pb(NO3)2 + H2S→PbS+2HNO3 the percentage by volume of hydrogen sulphide in the air is
10.0dm3 of air containing H2S as an impurity was passed through a solution of P…
Read more
Secondary>Science>>Chemistry>>>JAMB 1990
X(g)➜X(g). The type of energy involved in the above transformation is
X(g)➜X - (g). The type of energy involved in the above transformation is A. ion…
Read more
Secondary>Science>>Chemistry>>>JAMB 1990
Which of the following terms indicates the number of bonds that can be formed by an atom?
Which of the following terms indicates the number of bonds that can be formed b…
Read more
Secondary>Science>>Chemistry>>>JAMB 1990
Which of the four atoms P,Q,R, and S in the above data can be described by the following properties: relative atomic mass is greater than 30 but less than 40; it has an odd atomic number and forms a unipositive ion in solution?
Which of the four atoms P,Q,R, and S in the above data can be described by the …
Read more
Secondary>Science>>Chemistry>>>JAMB 1990
A basic postulate of the kinetic theory of gases is that the molecules of a gas move in straight lines between collisions. This implies that
A basic postulate of the kinetic theory of gases is that the molecules of a gas…
Read more
Secondary>Science>>Chemistry>>>JAMB 1990
The Avogadro number of 24g of magnesium is the same as that of
4. The Avogadro number of 24g of magnesium is the same as that of A. 1g of hy…
Read more
Secondary>Science>>Chemistry>>>JAMB 1990
In the reaction: SnO2+2C 一> Sn+2CO, the mass of coke containing 80% carbon required to reduce 0.302 kg of pure tin oxide is
In the reaction: SnO2+2C 一> Sn+2CO, the mass of coke containing 80% carbon r…
Read more
Secondary>Science>>Chemistry>>>JAMB 1990
A change in the physical states of a chemical substance T are shown in the scheme below. The letters X,Y and Z respectively represent
A change in the physical states of a chemical substance T are shown in the sch…
Read more
Secondary>Science>>Chemistry>>>JAMB 1990
Which of the following is a physical change?
Which of the following is a physical change? A. The bubbling of chlorine into …
Read more
Secondary>Science>>Chemistry>>>WAEC1988
How does the collision theory explain the rate of a chemical reaction?
5(a) How does the collision theory explain the rate of a chemical reaction? 5(b…
Read more
- Kingsley Thompson
- Schoolarchive is the worldwide leader in educational contents since year 2018. Schoolarchive has been on mission to assist students pass their junior secondary school certificate examination, Cambridge/check point, waec/neco, gce, igcse/A level, jamb, post utme and to assist to be teachers and professional teachers. We cover British/Nigerian curriculum, American/Nigerian curriculum. To learn more about schoolarchive, it's values and it's offering subscribe to our channel to stay informed.
Secondary>Science>>Chemistry>>>JAMB 2018
Social Plugin