Chem Maybe

Question 1

Preparation of HNO3?

Answer 1

Lab: NaNO3 + H2SO4 —> HNO3

Large scale :OSWALDS PROCESS

Question 2

Oswalds process steps?

Answer 2

1. NH3 + O2(air) —> NO
2. NO + O2-–> NO2
3. NO2 + H2O —-> HNO3 + NO

Question 3

On oxidation of metals or Non metals by Concentrated HNO3 the gas always obtained is ??

Answer 3

NO2 !!!!!

Question 4

Cu + dil.HNO3—> Cu(NO3)2 + X
Cu +Conc.HNO3 —-> Cu(NO3)2 + Y
X and Y gases are ?

Answer 4

With dilute= NO

With conc = NO2

Question 5

Fe3+ to Fe2+

MnO4- to Mn2+ (decolourises). RXNS of ?

Answer 5

MOIST SO2 —> reducing agent

Question 6

PbS—-> PbSO4

I- —-> I2 . Rxns of ?

Answer 6

Ozone !

Powerful oxidizing agent.

Question 7

Conc HNO3 + i2 gives

Conc HNO3 + C gives

Conc HNO3 + S8 gives

Conc HNO3 +P4 gives

Answer 7

1. HIO3 iodic acid
2. CO2
3. Sulphuric acid
4. Phosphoric acid H3PO4

Question 8

HNO3 and water gives H3O+ and NO3- ions this shows

Answer 8

It’s a strong acid.

Question 9

Heart wood central part of secondary xylem is dark due to

Answer 9

Resins tannins essential oils etc (make it hard and durable resistant to insects )

Question 10

Zeta potential is

Answer 10

The potential difference between the HELMHOLTZ ELECTRIC DOUBLE LAYER OF -ve and +ve charges

Question 11

Zeta potential helps in determining ?

Answer 11

Stability of colloidal solution

Question 12

Convulvulaceae and solanaceae come under the order ?

Answer 12

Polymoniales

Question 13

Panthera pardus is

Answer 13

Leopard

Question 14

Panthera and felis are

Answer 14

Genus !

Question 15

Panthera and felis come under family

Answer 15

Felidae

Question 16

Felidae + canidae ?

Answer 16

Carnivora (order)

Question 17

Monkey gorilla gibbon are in the order ?

Answer 17

Primata

Question 18

The label of herbarium sheet has

Answer 18

English name local name scientific name
Date and location
Collectors name
Family

Question 19

Each statement of key is called

Answer 19

Lead

Question 20

Mesophyll cells in monocot are not differentiated into

Answer 20

Palisade and spongy

Question 21

The adaxial cells over the veins turn into large colorless cells called

Answer 21

Bulliform cells

Question 22

Dicots—-> OPEN

MONOCOTS—-> CLOSED

Question 23

Roots —-> RADIAL

STEM AND LEAF ——> CONJOINT

Question 24

Phellogen is

Answer 24

Cork cambium

Question 25

Cork cambium + vascular cambium =

Answer 25

Lateral meristems which cause secondary growth

Question 26

Cork cambium is meristematic tissue formed in ?

Answer 26

Cortex region

Question 27

Radial meristematic narrow band going thru xylem and phloem is

Answer 27

Secondary medullary rays!

Question 28

Outer side the cork cambium forms

Answer 28

Cork = PHELLEM

Question 29

Inner side cork cambium forms ?

Answer 29

Secondary cortex

Question 30

Guava cucumber ray florets

Answer 30

Epigynous

Question 31

Stem of potato ginger turmeric zamin colo. —- organs perennation Stem tendrils gourds cucu waterme pump grape vine Thorns - bougain, citrus Photosyn OPUNTIA ,EUPHORIA

Answer 31

STEM MODIFICATIONSSSS

Question 32

Zygomorphic is fabaceae