The given graph shows the variation of boiling point
of water with pressure.
Which of the following best represents the state(s) of water at points X, Y and Z?
Fill in the blanks by choosing the correct option.Turmeric is one of the most commonly used spices in
our kitchen. It leaves a yellow stain on white clothes.
On rubbing with soap which is p in nature, the yellow
stain changes to q colour. Now, if we pour some
r containing s over this stain, it again becomes
yellow in colour due to t .
|A||Alkaline||Red||Lemon juice||Acetic acid||Formation of water|
|B||Acidic||Green||Lime Lime||Sodium hydroxide||Neutralisawatertion reaction|
|C||Neutral||Dark pink||Lime water||Potassium hydroxide||Formation of water|
|D||Alkaline||Red||Lemon juice||Citric acid||Neutralisation reaction|
Study the given dichotomous key and select the correct option.
I. a. It is a unicellular organism - go to II
b. It is multicellular organism - go to III
II. a. It contains chlorophyll - P
b. It does not contain chlorophyll - Q
III. a. It is used in production of antibiotics - R
b. It decomposes the organic waste and dead plants and animals - S
AP could be Spirogyra whereas Q could be Rhizopus.
BR could be Penicillium whereas S could be diatoms.
CP could be Chlamydomonas whereas R could be Streptomyces.
DNone of these
Refer to the given diagram and
identify the correct statements.
(i) J produces saliva which contains enzyme amylase that breaks down cellulose and starch into simple sugars.
(ii) Digestive juices secreted by N contain enzyme which breakdown the proteins into simple substances. N also secretes HCl, which kills harmful microorganisms present in food.
(iii) K is the largest gland in the body and its secretion helps in digestion of fats.
(iv) M bears finger like projections called villi and it stores digestive juice secreted by liver.
(v) P helps in absorption of food and transports digested food to different organs through blood capillaries.
(vi) Q is small structure at junction of small and large intestine which stores faecal matter until egestion.
(vii) Digestive juices of L help in digestion of proteins, carbohydrates and fats.
(viii) O absorbs water and minerals from the chyme.
A(ii), (iii), (v), (vii) and (viii) only
B(i), (iii), (iv), (vi) and (viii) only
C(ii), (iv), (v) and (vi) only
D(i), (ii), (v), (vi) and (viii) only
Read the given statements and state (T) for true and (F) for false ones.
I. A compound can be broken down into its constituent elements by chemical methods.
II. A compound always contains the same elements combined together chemically in a fixed ratio.
III. A compound retains the properties of its constituent elements.
IV. When two or more elements or compounds are brought together, they always react chemically.
V. Tap water is a compound.
Refer to the given figure.
Which of the following statements is correct regarding the process shown in the figure?
AProcess I prevents loss of water from plants whereas process III is involved in dew formation.
BThe physical states of water at X and Y are liquid and gas, respectively.
CProcess II speeds up in windy condition.
DDeforestation will decelerate process V and accelerate process IV.