Chemistry Quiz 21

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Chemistry Quiz 21

1 / 50

Unit of heat in SI system is________________?

2 / 50

Ozone hole is substantial depletion of ozone in every year during__________________?

3 / 50

How many electrons are there in benzene to form delocalized electron cloud________________?

4 / 50

The molar mass of an organic acids is determined by____________?

5 / 50

The number of ions produced by [Pt(NH3)]Cl2?

6 / 50

The volume occupied by 2.8 g of N2 at STP______________________?

7 / 50

When water freezes at 0?C its density decreases due to_______________?

8 / 50

Which of the following is not a use of silicon ?

9 / 50

Nitronium ion is___________________?

10 / 50

The structure of H2O2 is_______?

11 / 50

In electrolytic solution conductance of electricity is due to _____________________?

12 / 50

Measurement of the degree of polarity is___________________?

13 / 50

The law which states that the amount of gas dissolved in a liquid is proportional to its partial pressure is___________?

14 / 50

Which one of the following is not a good leaving group ?

15 / 50

In the purification of portable water the coagulant used is_________________?

16 / 50

If a graph is plotted between temperature on x-axis and volume on y-axis for 1 mole of gas then we get straight line which cuts the temperature exis at________________?

17 / 50

Space around nucleus where finding probability of electrons is maximum is called ____________________?

18 / 50

Which one of the following halogens is present in Teflon________________?

19 / 50

Who used the term Concentrationwindow to draw the arbitrary lines of demarcation

20 / 50

On heating aldehydes with Fehlings solution we get a precipitate whose colour is_________________?

21 / 50

1 mole of electron has mass in microgram_________________?

22 / 50

Energy released or absorbed when electrons are added in atom is_________________?

23 / 50

Polyester resins are the product of the reaction of__________________?

24 / 50

Which of the following solids show anisotropy___________________?

25 / 50

Which of the following is not an ester_________________?

26 / 50

Incomplete oxidation of methane in the limited supply of air forms ?

27 / 50

Which one of the following is also known as tartaric acid ?

28 / 50

In a molecule of carbon monoxide, what are the formal charges on the two atoms?

29 / 50

The melting points and boiling points upto meddle of 3d- series ____________________?

30 / 50

Which is the unit of (K) rate constant for zero order reaction ?

31 / 50

Which one of the following alcohols will be formed when ethyl magnesium bromide reacts with acetone ?

32 / 50

Iodine is solid due to_________________?

33 / 50

Vander Waals forces are stronger in_______________?

34 / 50

FeSO4 forms brown ring with________________?

35 / 50

The formula C6H5-CO-CH3 represents_______ ?

36 / 50

General formula of alkyne is______________?

37 / 50

The reciprocal of the coefficent of viscosity is called__________?

38 / 50

The coloured glassy mass in borax bead test is due to the formation of___________________?

39 / 50

Sodium carbonate is produced by____________?

40 / 50

Rate expression for ammonia synthesis is___________________?

41 / 50

In primary alkyl halides the halogen atom is attached to a carbon which is further attached to how many carbon atoms__________________?

42 / 50

Addition of 2% gypsum in cement________________?

43 / 50

In a period the atomic radius ?

44 / 50

Isotopes differ in_________________?

45 / 50

Gypsum is______?

46 / 50

AgCl dissolved with conc (2?10-2) Ksp will be__________________?

47 / 50

The sample of isotopes of an element which needs not to be vaporized in the vaporization chamer_________________?

48 / 50

The solution which distils over with change in composition________________?

49 / 50

When 6d orbital is complete the entering electron goes into_________________?

50 / 50

A sample of an iron and oxygen ore has a mass of 35.8 grams. The iron in the compound has a mass of 27.9 grams. What is the percent iron in the ore?

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