Recent questions without an upvoted answer

0 votes

1 answer

The figure below shows variation of number of outermost electrons (1) with atomic number of elements in the periodic table

asked Jun 22, 2021 in Chemistry Form 2 by anony mous

0 votes

1 answer

A soapless detergent has the formula

asked Jun 22, 2021 in Chemistry Form 4 by anonymous

0 votes

1 answer

State one difference in the properties of potassium and sodium soaps.

asked Jun 22, 2021 in Chemistry Form 4 by anonymous

0 votes

1 answer

Compound C was used to prepare a potassium soap.

asked Jun 22, 2021 in Chemistry Form 4 by anonymous

0 votes

1 answer

The figure below shows part of the structure of a polymer. Give the name of the polymer.

asked Jun 22, 2021 in Chemistry Form 4 by anony mous

0 votes

1 answer

Analysis of a river water sample showed the presence of the following ions Ca2+, Na+, Cl− , NO3−.

asked Jun 22, 2021 in Chemistry Form 4 by anonymous

0 votes

1 answer

Water containing hydrogen carbonate, HCO3− and calcium Ca2+ ions, is said to be hard water

asked Jun 22, 2021 in Chemistry Form 4 by anonymous

0 votes

1 answer

The half-life of Th is 1.9 years. If after 5.7 years the mass of Th was found to be 1.25 g. Determine the initial mass of the radioactive isotope

asked Jun 22, 2021 in Chemistry Form 4 by anony mous

0 votes

1 answer

Complete combustion of one mole of an alkanol, CxHyOH gave four moles of water. (C= 12.0, H = 1.0, O = 16.0)

asked Jun 22, 2021 in Chemistry Form 3 by anony mous

0 votes

1 answer

A volume of sulphur IV) oxide gas diffused from an apparatus in 96 seconds. Calculate the time taken by an equal volume of carbon(IV) oxide to diffuse under the same conditions. (C = 12.0: O=16.0; S = 32.0)

asked Jun 22, 2021 in Chemistry Form 3 by anony mous

0 votes

1 answer

Consider the following reaction. H2S+Cl2 →2HCI+S

asked Jun 22, 2021 in Chemistry Form 2 by anony mous

0 votes

1 answer

The table gives standard reduction potentials for some half cells.

asked Jun 22, 2021 in Chemistry Form 4 by anonymous

0 votes

1 answer

State one factor that affects the preferential discharge of ions at the cathode

asked Jun 22, 2021 in Chemistry Form 4 by anony mous

0 votes

1 answer

Salts may be classified as soluble or insoluble. Select from the following list a pair of compounds that can be used to prepare a soluble and an insoluble salt

asked Jun 22, 2021 in Chemistry Form 2 by anony mous

0 votes

1 answer

The table shows the elements in period 3 of the periodic table. Study it and answer the questions that follow.

asked Jun 22, 2021 in Chemistry Form 4 by anonymous

0 votes

1 answer

Compound V reacts with water as shown in the following equation. V+H2O → CH3CH2CH2OH

asked Jun 22, 2021 in Chemistry Form 2 by anony mous

0 votes

1 answer

6.2g of phosphorus was reacted with excess oxygen to form phosphorus( V) oxide. Determine the mass of the oxide formed. (0 = 16.0; P 31.0)

asked Jun 22, 2021 in Chemistry Form 3 by anony mous

0 votes

1 answer

Outline the differences between Quran and Hadith Qudsi

asked Jun 21, 2021 in IRE Form 3 by Mohammed hamoud

0 votes

1 answer

Use the information in the Table to answer the questions that follow.

asked Jun 21, 2021 in Chemistry Form 3 by anony mous

0 votes

1 answer

In a certain factory, iron is extracted from the haematite ore using the blast furnace as shown in Figure 1. The other raw materials are coke, limestone and air. The melting and boiling points of iron are 1535°C and 3000 °C, respectively.

asked Jun 21, 2021 in Chemistry Form 3 by anonymous

Page:

« prev
1
...
305
306
307
308
309
310
311
...
319
next »

...